{HEAD ~ The solution} is poured in {TAIL ~ a reactor} and stirred to get a homogeneous mixture 
is poured in
{ HEAD ~ The solution } is poured in { TAIL ~ a reactor } and stirred to get a homogeneous mixture
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH