# filename: ex155.rq

PREFIX e: <http://learningsparql.com/ns/expenses#> 

SELECT ?description ?date ?maxAmount 
WHERE
{
  {
    SELECT (MAX(?amount) as ?maxAmount) 
    WHERE { ?meal e:amount ?amount . }
  }
  {
    ?meal e:description ?description ;
          e:date ?date ;
          e:amount ?maxAmount .
  }
}