CREATE TABLE table_78487 ("Driver" TEXT, "Constructor" TEXT, "Laps" TEXT, "Time/Retired" TEXT, "Grid" TEXT)

How many laps does jean-christophe boullion have with a time/retired of +1 lap?
SELECT "Laps" FROM table_78487 WHERE "Time/Retired" = '+1 lap' AND "Driver" = 'jean-christophe boullion'
SELECT "Laps" FROM "table_78487" WHERE "Driver" = 'jean-christophe boullion' AND "Time/Retired" = '+1 lap'