<e1>Horseshoes</e1> are made by <e2>blacksmiths</e2> and blacksmithing is considered a very lucky trade.
Horseshoes are made by
Horseshoes are made by blacksmiths and blacksmithing is considered a very lucky trade.
<triplet> Horseshoes <subject> blacksmiths <object> Product-Producer(e1,e2)