In {TAIL ~ such cases}, rain water and {HEAD ~ precipitation} can collect on a top surface 
In
In { TAIL ~ such cases } , rain water and { HEAD ~ precipitation } can collect on a top surface
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH