{HEAD ~ The collection container} may be filled with {TAIL ~ the material} and separating the material to form the selected fraction 
filled with
{ HEAD ~ The collection container } may be filled with { TAIL ~ the material } and separating the material to form the selected fraction
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH