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_34410 ( "Week" real, "Date" text, "Opponent" text, "Result" text, "Game site" text, "Attendance" real )

### Question ###
Which Week has an Opponent of baltimore colts, and an Attendance smaller than 55,137?

### Accurate SQL ###

SELECT AVG("Week") FROM table_34410 WHERE "Opponent" = 'baltimore colts' AND "Attendance" < '55,137'