CREATE TABLE table_55628 ("Year" FLOAT, "Network" TEXT, "Play-by-play" TEXT, "Colour commentator ( s ) " TEXT, "Studio host" TEXT)

Which network has a play-by-play announcer of John Wells?
SELECT "Network" FROM table_55628 WHERE "Play-by-play" = 'john wells'
SELECT "Network" FROM "table_55628" WHERE "Play-by-play" = 'john wells'