unless it happens to cover your particular area of interest 
(ROOT (SBAR (IN unless) (S (NP (PRP it)) (VP (VBZ happens) (S (VP (TO to) (VP (VB cover) (NP (NP (PRP$ your) (JJ particular) (NN area)) (PP (IN of) (NP (NN interest)))))))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (VBZ ) (S (VP (TO ) (VP (VB ) (NP (NP (PRP$ ) (JJ ) (NN )) (PP (IN ) (NP (NN )))))))))))