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FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAhoAAAIFCAIAAAAbW8M/AAEAAElEQVR4nMT96ZcdN3IngAaQeffaNxY3cRepXe1ut(...TRUNCATED)
math_vqa
{ "ground_truth": "$$35^{\\circ}$$", "style": "rule" }
{"answer":"$$35^{\\circ}$$","id":"abb5ab16-df73-44d9-8869-405babf18eeb","index":3073,"question":"As (...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAADSkAAAHaCAIAAADZ57qlAAEAAElEQVR4nOz9SY9tSZIeCIqo6hnubOObfIgpkxlJd(...TRUNCATED)
math_vqa
{ "ground_truth": "$$0.6$$", "style": "rule" }
{"answer":"$$0.6$$","id":"ea991007-c539-4357-9306-a353da5212a7","index":1176,"question":"The table b(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAGwAAABZCAYAAADb0cHTAAAPLUlEQVR4nO2de0xUxxfHP3d3YWFRwJVHKvFFWi2og(...TRUNCATED)
math_vqa
{ "ground_truth": "3/4", "style": "rule" }
{"answer":"3/4","id":"1b879781-05b3-4254-b1cf-34d64ffb3275","index":1533,"question":"As shown in the(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAK0AAABjCAYAAADpTYCHAAAd8UlEQVR4nO2dd0AU59aHn9ldkAWCUbAhig0xejWW2(...TRUNCATED)
math_vqa
{ "ground_truth": "$$\\dfrac{1}{4}\\mathrm \\pi$$", "style": "rule" }
{"answer":"$$\\dfrac{1}{4}\\mathrm \\pi$$","id":"ca4f4346-11a6-4658-ab58-b92a705be2a1","index":1658,(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAHoAAABjCAYAAABUgBS3AAAzL0lEQVR4nO2dd5hV1b33P7udNpVpMDAMA6EoWBApo(...TRUNCATED)
math_vqa
{ "ground_truth": "$\\frac{1}{2}$", "style": "rule" }
{"answer":"$\\frac{1}{2}$","id":"c5471654-18a7-49c4-8702-386f46c2cfe8","index":2742,"question":"As s(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAEcAAABVCAIAAACUzG7YAAAcg0lEQVR4nLV8WXBdxbXo6u69zzxpnizZPpYlW1aMP(...TRUNCATED)
math_vqa
{ "ground_truth": "$13cm$", "style": "rule" }
{"answer":"$13cm$","id":"c46a574a-f285-446f-92c4-9258577197ff","index":3871,"question":"As shown in (...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAANYAAABxCAYAAACp+l14AAAgWklEQVR4nO2deXQUVfbHP9XdSWchC9lXA9k3SIJsI(...TRUNCATED)
math_vqa
{ "ground_truth": "5", "style": "rule" }
{"answer":"5","id":"becffede-d261-403a-8cd0-b8f5e5423bf6","index":1449,"question":"As shown in the f(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAfoAAAGZCAIAAADuF2TqAAEAAElEQVR4nOz915Md15Umju690+fJ4015X6gCquANC(...TRUNCATED)
math_vqa
{ "ground_truth": "4% 51", "style": "rule" }
{"answer":"4% 51","id":"52538d7a-f24f-4b3a-84ac-f6f038f46b4d","index":255,"question":"The stem-and-l(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAwIAAAKPCAIAAABRh+pdAAEAAElEQVR4nOz9aXMbybKuC3pE5IwZ4ExqVtUa9trHd(...TRUNCATED)
math_vqa
{ "ground_truth": "$$ 2 \\leqslant k \\leqslant 16$$", "style": "rule" }
{"answer":"$$ 2 \\leqslant k \\leqslant 16$$","id":"c1514916-efeb-4359-8a75-b00a251406ef","index":89(...TRUNCATED)
FanqingM/MMK12
[{"content":"You are a helpful assistant answering a question about an image.\n\nAlways output exact(...TRUNCATED)
[{"bytes":"iVBORw0KGgoAAAANSUhEUgAAAc8AAAGQCAYAAADIoOsJAAAk9ElEQVR4nO3dT0xT+f7/8Vd/mdzbu7KuLi5uKInOl(...TRUNCATED)
math_vqa
{ "ground_truth": "3", "style": "rule" }
{"answer":"3","id":"dc16525e-9522-4100-bdb1-07a74ca46b9b","index":1528,"question":"If the graph of t(...TRUNCATED)
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This is the training data used in the ExpertLens paper. For further information, please refer to the project webpage, paper, and repository.

Citation

If you use ExpertLens in your research, please consider citing our work:

BibTeX:

@article{marsili2026expertlens,
  title   = {Harnessing Domain Specialists in Multimodal Mixture-of-Experts for Efficient Adaptation},
  author  = {Marsili, Damiano and Kang, Raphi and Mehta, Aditya and Perona, Pietro and Gkioxari, Georgia},
  journal = {arXiv preprint arXiv:2610.02123},
  year    = {2026}
}
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