Table: us_womens_open_championship
Columns: year
champion
country
venue
location
score
to_par
purse
winner_s_share

Question: Which Year is the highest one that has a Venue of blackwolf run, composite course, and a Score of 281?
SQL: SELECT MAX("year") FROM us_womens_open_championship WHERE "venue" = 'blackwolf run, composite course' AND "score" = '281'

Question: Which Champion has a Venue of old waverly golf club?
SQL: SELECT "champion" FROM us_womens_open_championship WHERE "venue" = 'old waverly golf club'