A text queries search on the content of {TAIL ~ text fields} for approximate matches to the given text search expression, {HEAD ~ e.g., the existence} of certain phrases or word stems 
A text queries search on the content of { TAIL ~ text fields } for approximate matches to the given text search expression , { HEAD ~ e.g. , the existence } of certain phrases or word stems
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH