| rlist UNION rlist { MQUnion ($1, $3) }
| rlist INTER rlist { MQIntersect ($1, $3) }
| USE rlist POS svar { MQUse ($2, $4) }
| rlist UNION rlist { MQUnion ($1, $3) }
| rlist INTER rlist { MQIntersect ($1, $3) }
| USE rlist POS svar { MQUse ($2, $4) }