CREATE TABLE "table1_25518547_3" (
  "pick_num" real,
  "mls_team" text,
  "player" text,
  "position" text,
  "affiliation" text
);

Question: How many teams drafted players from the University of Maryland?
SQL: SELECT COUNT("mls_team") FROM "table1_25518547_3" WHERE "affiliation"='University of Maryland';

Question: What MLS team drafted samuel appiah?
SQL: SELECT "mls_team" FROM "table1_25518547_3" WHERE "player"='Samuel Appiah';

Question: What player was drafted by the philadelphia union?
SQL: SELECT "player" FROM "table1_25518547_3" WHERE "mls_team"='Philadelphia Union';