code: @Override
  	public Collection<BioPAXElement> generate(Match match, int... ind)
  	{
  		PhysicalEntity pe = (PhysicalEntity) match.get(ind[0]);
  		Set<BioPAXElement> set = getLinkedElements(pe);
  
  		return set;
  	}
docs: Gets to the linked PhysicalEntity.
  @param match current pattern match
  @param ind mapped indices
  @return linked PhysicalEntity