The CO of {TAIL ~ the second stream} is reacted with {HEAD ~ water} to produce formic acid 
The CO of { TAIL ~ the second stream } is reacted with { HEAD ~ water } to produce formic acid
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH