how many millions of north american viewers had the episode whose director was Michael Lembeck? 
CREATE TABLE table_27714573_1 (us_viewers__millions_ VARCHAR, directed_by VARCHAR)
SELECT us_viewers__millions_ FROM table_27714573_1 WHERE directed_by = "Michael Lembeck"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_27714573_1 (us_viewers__millions_ VARCHAR, directed_by VARCHAR) Question: how many millions of north american viewers had the episode whose director was Michael Lembeck?  [/INST] SELECT us_viewers__millions_ FROM table_27714573_1 WHERE directed_by = "Michael Lembeck" </s>