Yet {HEAD ~ another step} comprises harvesting {TAIL ~ the seeds} from at least one of the parent pea plants 
comprises harvesting
Yet { HEAD ~ another step } comprises harvesting { TAIL ~ the seeds } from at least one of the parent pea plants
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH