CREATE TABLE table_203_245 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" CLOB)

what is the number of marathons that silva ran in the united states ?
SELECT COUNT(*) FROM table_203_245 WHERE "venue" = 'united states'
SELECT COUNT(*) FROM "table_203_245" WHERE "venue" = 'united states'