CREATE TABLE table_name_50 (finish VARCHAR2, engine VARCHAR2, start VARCHAR2)

What was Andretti's finish for the year he had a Buick engine and started 16th?
SELECT finish FROM table_name_50 WHERE engine = "buick" AND start = "16th"
SELECT "finish" FROM "table_name_50" WHERE "16th" = "start" AND "buick" = "engine"