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_3790 ( "Year" text, "Stage" real, "Start of stage" text, "Distance (km)" text, "Category of climb" text, "Stage winner" text, "Nationality" text, "Yellow jersey" text, "Bend" real )

### Question ###
How many bends occur when the yellow jersey is Lance Armstrong and stage winner is Lance Armstrong?

### Accurate SQL ###

SELECT COUNT("Bend") FROM table_3790 WHERE "Yellow jersey" = 'Lance Armstrong' AND "Stage winner" = 'Lance Armstrong'