Table: italian_grand_prix_1995
Columns: driver
constructor
laps
time_retired
grid

Question: What is the average number of laps when Gerhard Berger is the driver?
SQL: SELECT AVG("laps") FROM italian_grand_prix_1995 WHERE "driver" = 'gerhard berger'

Question: What is the name of the constructor who has more than 50 laps and a grid of 7?
SQL: SELECT "constructor" FROM italian_grand_prix_1995 WHERE "laps" > 50 AND "grid" = 7