How to use use the websocket API to request more then one instrument

Hi,

We are using the WebSocket API https://api.edp.thomsonreuters.com/streaming/pricing/v1/

We
haven’t find a way to request more than one instrument at the time and get a snapshot request. Our
understanding at the moment is that we should start the stream for a
certain instrument, get the snapshot data and terminate the stream. Is it an option to request more than once instruments in the same query
and how do we do it?

The nest question is weather we can start more than one stream in the same time from one virtual
machine?