Question: how many original airdate with writer(s) being becky hartman edwards and director being adam nimoy
Schema: create table table_13956521_2 (original_airdate varchar, writer_s_ varchar, director varchar, PRIMARY KEY (original_airdate))
SQL: select count(original_airdate) from table_13956521_2 where writer_s_ = "becky hartman edwards" and director = "adam nimoy"