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_name_91 (win__percentage INTEGER, span VARCHAR, lost VARCHAR)

### Question ###
What is the Win % in the Span of 2011–2013 with a Lost of less than 1?

### Accurate SQL ###

SELECT AVG(win__percentage) FROM table_name_91 WHERE span = "2011–2013" AND lost < 1