{HEAD ~ The pot life} of the formulation after mixing is {TAIL ~ about three to about four hours} 
is
{ HEAD ~ The pot life } of the formulation after mixing is { TAIL ~ about three to about four hours }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL