question: Which Lead Pitch/mm has a Part Number of tsop40, and a Body Length/mm larger than 18.4?
answer: SELECT MAX(lead_pitch_mm) FROM table_name_1 WHERE part_number = "tsop40" AND body_length_mm > 18.4
context: CREATE TABLE table_name_1 (lead_pitch_mm INTEGER, part_number VARCHAR, body_length_mm VARCHAR)