Table schema:
CREATE TABLE table_name_21 (rank VARCHAR, constituency VARCHAR, result VARCHAR, winning_party_2003 VARCHAR, swing_to_gain VARCHAR)

Question: Which rank had the Labour party winning in 2003, a swing to gain that was larger than 2.13, a lab hold as a result, and which took place in the Linlithgow constituency?
SQL: SELECT rank FROM table_name_21 WHERE winning_party_2003 = "labour" AND swing_to_gain > 2.13 AND result = "lab hold" AND constituency = "linlithgow"