{HEAD ~ The catalyst} 7 in which {TAIL ~ the catalytically active metal comprises} platinum, palladium, and rhodium 
{ HEAD ~ The catalyst } 7 in which { TAIL ~ the catalytically active metal comprises } platinum , palladium , and rhodium
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH