Table: lpga_classic_results
Columns: year
dates
champion
country
winning_score
to_par
margin_of_victory
purse
winners_share

Question: How much is the purse ( $ ) when the margin of victory is 1 stroke?
SQL: SELECT "purse" FROM lpga_classic_results WHERE "margin_of_victory" = '1 stroke'

Question: What is the number of "to par" in Mexico with a winning score of 67-67-69-70=273?
SQL: SELECT "to_par" FROM lpga_classic_results WHERE "country" = 'Mexico' AND "winning_score" = '67-67-69-70=273'