Table schema:
CREATE TABLE table_name_4 (margin_of_victory VARCHAR, runner_s__up VARCHAR, tournament VARCHAR)

Question: Which Margin of victory has a Runner(s)-up of betty burfeindt, and a Tournament of pompano beach classic?
SQL: SELECT margin_of_victory FROM table_name_4 WHERE runner_s__up = "betty burfeindt" AND tournament = "pompano beach classic"