'll need a stronger stomach than us 
(ROOT (S (VP (MD 'll) (VP (VB need) (NP (NP (DT a) (JJR stronger) (NN stomach)) (PP (IN than) (NP (PRP us))))))))
(ROOT (S (VP (MD ) (VP (VB ) (NP (NP (DT ) (JJR ) (NN )) (PP (IN ) (NP (PRP ))))))))