{HEAD ~ The groups} of {TAIL ~ spade section} and associated connectors are joined together to form a plurality of structural segments  
of
{ HEAD ~ The groups } of { TAIL ~ spade section } and associated connectors are joined together to form a plurality of structural segments
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH