How many won the LMP1 on round 4 if No. 42 Strakka Racing was the LMP2 Winning Team?
CREATE TABLE "table1_24865763_2" (
  "rnd" real,
  "circuit" text,
  "lmp1_winning_team" text,
  "lmp2_winning_team" text,
  "flm_winning_team" text,
  "gt1_winning_team" text,
  "gt2_winning_team" text,
  "results" text
);
SELECT COUNT("lmp1_winning_team") FROM "table1_24865763_2" WHERE "rnd"=4 AND "lmp2_winning_team"='No. 42 Strakka Racing';