CREATE TABLE "former_or_demolished_stadiums" (
  "stadium" text,
  "capacity" real,
  "city" text,
  "state_province" text,
  "closed" real
);

Question: Tell me the sum of closed for city of pittsburgh and capacity larger than 59,000
SQL: SELECT SUM("closed") FROM "former_or_demolished_stadiums" WHERE "city"='pittsburgh' AND "capacity">'59,000';

Question: Tell me the lowest closed for capacity of 62,439
SQL: SELECT MIN("closed") FROM "former_or_demolished_stadiums" WHERE "capacity"='62,439';