CREATE TABLE table_59490 ("Name" TEXT, "Position" TEXT, "League Apps" TEXT, "League Goals" FLOAT, "FA Cup Apps" TEXT, "FA Cup Goals" FLOAT, "League Cup Apps" TEXT, "League Cup Goals" FLOAT, "Total Apps" TEXT, "Total Goals" FLOAT)

What is the League Goals when the FA Cup Goals are 0, position is mf, League Cup Apps of 0, and name is Ben Thornley?
SELECT AVG("League Goals") FROM table_59490 WHERE "FA Cup Goals" = '0' AND "Position" = 'mf' AND "League Cup Apps" = '0' AND "Name" = 'ben thornley'
SELECT AVG("League Goals") FROM "table_59490" WHERE "FA Cup Goals" = '0' AND "League Cup Apps" = '0' AND "Name" = 'ben thornley' AND "Position" = 'mf'