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_93 (ends INTEGER, since VARCHAR, name VARCHAR)

### Question ###
What is the average Ends with a Since of 2003, and a Name with márquez?

### Accurate SQL ###

SELECT AVG(ends) FROM table_name_93 WHERE since = 2003 AND name = "márquez"