query: SELECT count(*) FROM Ref_Shipping_Agents JOIN Documents ON Documents.shipping_agent_code = Ref_Shipping_Agents.shipping_agent_code WHERE Ref_Shipping_Agents.shipping_agent_name = "USPS";
question: How many documents have been shipping by USPS?
query_toks: SELECT count ( * ) FROM Ref_Shipping_Agents JOIN Documents ON Documents.shipping_agent_code = Ref_Shipping_Agents.shipping_agent_code WHERE Ref_Shipping_Agents.shipping_agent_name = `` USPS '' ;
query_toks_no_value: select count ( * ) from ref_shipping_agents join documents on documents.shipping_agent_code = ref_shipping_agents.shipping_agent_code where ref_shipping_agents.shipping_agent_name = value
question_toks: How many documents have been shipping by USPS?