Table: vern_schuppan_stats
Columns: year
chassis
engine
start
finish

Question: Name the engine for year less than 1977
SQL: SELECT "engine" FROM vern_schuppan_stats WHERE "year" < 1977

Question: Name the start for year less than 1977
SQL: SELECT "start" FROM vern_schuppan_stats WHERE "year" < 1977

Question: Name the least year for start of 17th
SQL: SELECT MIN("year") FROM vern_schuppan_stats WHERE "start" = '17th'

Question: Name the start for finish being 21st
SQL: SELECT "start" FROM vern_schuppan_stats WHERE "finish" = '21st'