Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15187735_20 ( episode INTEGER, segment_a VARCHAR )

### Question ###
What episode number is the episode with a segment on thinning shears?

### Accurate SQL ###

SELECT MIN(episode) FROM table_15187735_20 WHERE segment_a = "Thinning Shears"