https://www.reuters.com/article/us-ridehailing-sanfrancisco/san-francisco-subpoenas-uber-lyft-on-driver-classification-idUSKCN1IU2IX >San Francisco's city attorney has subpoenaed Uber Technologies Inc [UBER.UL] and Lyft Inc to turn over records relating to how the ride-hailing firms classify drivers, as well as driver wages, health care and other benefits in the latest probe in the city's year-long investigation into the companies.