title: Gmail API query to retrieve unread messages sent after given time
body: <p>I am using gmail api to programatically retrieve email messages (using javascript) which are:
  1. unread
  2. sent after a given time</p>
  
  <p>I know the query for retrieving unread messages is : 'is:unread'
  and the query for retrieving messages sent after a particular date is 'in:sent after : yyyy/mm/dd' </p>
  
  <p>But How do we combine the above two queries into a single query?</p>
  
  <p>Also, if there is any documentation for the queries for searching messages supported by gmail api, please share the same - I don't seem to find it. </p>