Table: mark_winterbottom
Columns: name
team
laps
time_retired
grid

Question: What team has more than 49 laps and a grid of 8?
SQL: SELECT "team" FROM mark_winterbottom WHERE "laps" > 49 AND "grid" = 8

Question: What is the grid sum with more than 50 laps?
SQL: SELECT SUM("grid") FROM mark_winterbottom WHERE "laps" > 50