are attached to the concept of loss 
(ROOT (VP (VBP are) (VP (VBN attached) (PP (IN to) (NP (NP (DT the) (NN concept)) (PP (IN of) (NP (NN loss))))))))
(ROOT (VP (VBP ) (VP (VBN ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN ))))))))