CREATE TABLE table_55573 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What did the home team score when the away team was Hawthorn and there was a crowd larger than 20,851?
SELECT "Home team score" FROM table_55573 WHERE "Crowd" > '20,851' AND "Away team" = 'hawthorn'
SELECT "Home team score" FROM "table_55573" WHERE "Away team" = 'hawthorn' AND "Crowd" > '20,851'