left_col,right_col,sample_type
customer_id,address,P
customer_id,postcode,P
customer_id,state,P
customer_id,country,P
customer_id,property_valuation,P
customer_id,product_id,N
customer_id,online_order,N
customer_id,order_status,N
customer_id,product_first_sold_date,N
transaction_date,order_status,N
brand,order_status,N
product_line,order_status,N
list_price,order_status,N
list_price,standard_cost,N
address,transaction_id,N
address,customer_id,N
address,online_order,N
address,order_status,N
address,product_line,N
address,product_size,N
address,list_price,N
address,postcode,N
address,state,N
address,property_valuation,N
postcode,state,N