inquery(apartment).
inquery(rent).
inquery(boston).
hasword(p1,house).
hasword(p1,rentals).
hasword(p1,massachussets).
hasword(p1,boston).
hasword(p2,apartment).
hasword(p2,holidays).
hasword(p3,boston).
hasword(p3,rentals).
hasword(p4,rentals).
hasword(p4,usa).
hasword(p5,boston).
hasword(p5,celtics).
hasword(p6,apartment).
hasword(p6,sale).
hyperlink(p1,p2).
hyperlink(p1,p3).
hyperlink(p4,p3).
hyperlink(p4,p1).
hyperlink(p2,p6).
relevant(p1).
relevant(p3).
relevant(p4).