Chinastark/bird_dataset huggingface dataset:
Column: l_shipdate
Name: line item ship date
Data format: date
Description: ship date of line item
Column: l_orderkey
Name: line item order key
Data format: integer
Description: order key number of line item
Column: l_discount
Name: line item discount
Data format: real
Description: discount of line item 
Value description: 0.1: 10% off
Column: l_extendedprice
Name: line item extended price
Data format: real
Description: extended price of line item 
Value description: commonsense evidence:
full price before discount
discounted price = (l_extendedprice*(1-l_discount))
Column: l_suppkey
Name: line item suppkey
Data format: integer
Description: suppkey of line item
Column: l_quantity
Name: line item quantity
Data format: integer
Description: quantity of line item
Column: l_returnflag
Name: line item return flag
Data format: text
Description: return flag of line item 
Value description: commonsense evidence:
 R ? returned item
 A and "N": not returned item.
Column: l_partkey
Name: line item part key
Data format: integer
Description: part key of line item
Column: l_linestatus
Name: line item line status
Data format: text
Description: line status of line item 
Value description: NOT USEFUL
Column: l_tax
Name: line item tax
Data format: real
Description: tax of line item 
Value description: commonsense evidence:
charge = l_extendedprice * (1- l_discount) * (1+ l_tax)
Column: l_commitdate
Name: line item commit date
Data format: date
Description: commit date of line item
Column: l_receiptdate
Name: line item receipt date
Data format: date
Description: receipt date of line item 
Value description: commonsense evidence:
freight / shipping / delivery time = l_receiptdate - l_commitdate;
less shipping / delivery time --> faster shipping speed.
Column: l_shipmode
Name: line item ship mode
Data format: text
Description: ship mode of line item
Column: l_linenumber
Name: line item line number
Data format: integer
Description: unique id number identifying the line item
Column: l_shipinstruct
Name: line item ship instruct
Data format: text
Description: ship instruct of line item
Column: l_comment
Name: line item comment
Data format: text
Description: comment of line item