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