CREATE TABLE table_273 ("Series no." FLOAT, "Season no." FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production Code" FLOAT)

How many seasons was series number 47 shown?
SELECT COUNT("Season no.") FROM table_273 WHERE "Series no." = '47'
SELECT COUNT("Season no.") FROM "table_273" WHERE "Series no." = '47'