receive {TAIL ~ a request} from {HEAD ~ a subscriber} to be included in at least one of a survey pool and an advertising pool 
receive { TAIL ~ a request } from { HEAD ~ a subscriber } to be included in at least one of a survey pool and an advertising pool
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH