Add representative examples to the dataset card

README.md

@@ -31,6 +31,64 @@ released training split contains **150,720 image-caption pairs** in
 **151 WebDataset shards**. Each image keeps its source URL, creator,
 attribution, per-item rights metadata, and SHA-256 digest.
 
+## Representative examples
+
+These are actual records from the released training split, not benchmark cases.
+The text below each image is the sample's `caption_short_en`; complete bilingual
+captions, generation prompts, component constraints, and relation constraints are
+stored in the paired `.json` member.
+
+<table>
+  <tr>
+    <td width="50%" valign="top">
+      <img src="assets/examples/r4360_engine_cutaway.jpg" alt="Pratt &amp; Whitney R-4360 aero engine cutaway" width="100%"><br>
+      <b>Pratt &amp; Whitney R-4360 engine cutaway</b> · Level 4<br>
+      <sub><code>commons:107825147</code> · <a href="https://commons.wikimedia.org/wiki/File:20-09-072-R_4360.jpg">source · CC0</a></sub>
+    </td>
+    <td width="50%" valign="top">
+      <img src="assets/examples/turbofan_cutaway.gif" alt="Labeled turbofan engine cutaway" width="100%"><br>
+      <b>A detailed cutaway of a turbofan engine highlighting key components.</b> · Level 4<br>
+      <sub><code>commons:12365146</code> · Richard Wheeler (Zephyris) · <a href="https://commons.wikimedia.org/wiki/File:Turbofan3_Labelled.gif">source · CC BY-SA 3.0</a></sub>
+    </td>
+  </tr>
+  <tr>
+    <td width="50%" valign="top">
+      <img src="assets/examples/digital_camera_exploded.png" alt="Exploded digital camera with labeled internal components" width="100%"><br>
+      <b>Exploded view of a digital camera showing internal components.</b> · Level 4<br>
+      <sub><code>commons:12030060</code> · Shigeru23 · <a href="https://commons.wikimedia.org/wiki/File:Digital_camera_cut_model_1.PNG">source · CC BY-SA 3.0</a></sub>
+    </td>
+    <td width="50%" valign="top">
+      <img src="assets/examples/lunar_module_cutaway.png" alt="Lunar Module cutaway with component callouts" width="100%"><br>
+      <b>Cutaway illustration of the Lunar Module.</b> · Level 4<br>
+      <sub><code>commons:14623428</code> · NASA-MSFC / Adert · <a href="https://commons.wikimedia.org/wiki/File:LM_illustration_02-IT.png">source · public domain</a></sub>
+    </td>
+  </tr>
+  <tr>
+    <td width="50%" valign="top">
+      <img src="assets/examples/steamship_baltic_section.jpg" alt="Cross-section of the steamship Baltic" width="100%"><br>
+      <b>Cross section of the steamship “Baltic”.</b> · Level 5<br>
+      <sub><code>internet_archive:everettsencyclop00ever:n289</code> · <a href="https://archive.org/details/everettsencyclop00ever/page/n289/mode/1up">source · public domain</a></sub>
+    </td>
+    <td width="50%" valign="top">
+      <img src="assets/examples/hydro_turbine_section.jpg" alt="Sectional hydro turbine with generator above" width="100%"><br>
+      <b>Sectional view of a turbine showing the electric generator above.</b> · Level 5<br>
+      <sub><code>internet_archive:pickshovelpluckf00bond:n171</code> · <a href="https://archive.org/details/pickshovelpluckf00bond/page/n171/mode/1up">source · public domain</a></sub>
+    </td>
+  </tr>
+  <tr>
+    <td width="50%" valign="top">
+      <img src="assets/examples/four_cylinder_engine_section.jpg" alt="Four-cylinder internal combustion engine cross-section" width="100%"><br>
+      <b>Cross-sectional view of a four-cylinder internal combustion engine.</b> · Level 5<br>
+      <sub><code>internet_archive:ourwonderworldal02unse:n145</code> · <a href="https://archive.org/details/ourwonderworldal02unse/page/n145/mode/1up">source · public domain</a></sub>
+    </td>
+    <td width="50%" valign="top">
+      <img src="assets/examples/evans_klepetko_furnace_plate.jpg" alt="Multi-view engineering plate of the Evans-Klepetko furnace" width="100%"><br>
+      <b>Evans-Klepetko furnace details.</b> · Level 5<br>
+      <sub><code>internet_archive:cu31924004606608:n117</code> · <a href="https://archive.org/details/cu31924004606608/page/n117/mode/1up">source · public domain</a></sub>
+    </td>
+  </tr>
+</table>
+
 The target visual semantics are: a recognizable physical engineered object,
 normally hidden internal structure, meaningful component relationships, and an
 explanatory technical presentation. Ordinary product photos, software diagrams,