CREATE TABLE table_name_15 (team VARCHAR, driver VARCHAR, class VARCHAR, laps VARCHAR)

What is the team of driver klaus ludwig, who is class c1 and has more than 77 laps?
SELECT team FROM table_name_15 WHERE class = "c1" AND laps > 77 AND driver = "klaus ludwig"
SELECT "team" FROM "table_name_15" WHERE "c1" = "class" AND "driver" = "klaus ludwig" AND "laps" > 77