query: SELECT billing_state ,  COUNT(*) FROM invoices WHERE billing_country  =  "USA" GROUP BY billing_state;
question: List the number of invoices from the US, group by state.
query_toks: SELECT billing_state , COUNT ( * ) FROM invoices WHERE billing_country = `` USA '' GROUP BY billing_state ;
query_toks_no_value: select billing_state , count ( * ) from invoices where billing_country = value group by billing_state
question_toks: List the number of invoices from the US, group by state.