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_67 ( lowest INTEGER, stadium VARCHAR, average VARCHAR )

### Question ###
What's the highest lowest number of capacity that ibrox stadium has when the average is larger than 49,143?

### Accurate SQL ###

SELECT MAX(lowest) FROM table_name_67 WHERE stadium = "ibrox stadium" AND average > 49 OFFSET 143