Table: tour_de_france_1985
Columns: stage
date
route
terrain
length
winner

Question: Which route has a Date of 2 july?
SQL: SELECT "route" FROM tour_de_france_1985 WHERE "date" = '2 july'

Question: Which length has a Stage of 9?
SQL: SELECT "length" FROM tour_de_france_1985 WHERE "stage" = '9'

Question: Which date has a Terrain of plain stage, and a Stage of 4?
SQL: SELECT "date" FROM tour_de_france_1985 WHERE "terrain" = 'plain stage' AND "stage" = '4'