Table: giants_def_stats_2008
Columns: player
tackles
solo
assts
sacks
int_yards
int_avg
int_td
fum_rec
fum_rec_td

Question: What is the sum for the int yards that has an assts more than 3, and player Jay Alford?
SQL: SELECT SUM("int_yards") FROM giants_def_stats_2008 WHERE "assts" > 3 AND "player" = 'jay alford'