( ( ( Most ( gastropods ' ) ) eyes ) ( ( are ( located ( on ( ( the tips ) ( of ( their tentacles ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJS Most) (NNS gastropods) (POS ')) (NNS eyes)) (VP (VBP are) (VP (VBN located) (PP (IN on) (NP (NP (DT the) (NNS tips)) (PP (IN of) (NP (PRP$ their) (NNS tentacles))))))) (. .)))
Most gastropods' eyes are located on the tips of their tentacles.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NNS gastropods)) (VP (VBZ is) (VP (VBN noted) (PP (IN for) (S (VP (VBG having) (NP (PRP$ its) (NNS eyes)) (PP (IN at) (NP (NP (DT the) (NNS tips)) (PP (IN of) (NP (NNS stalks) (CC or) (NNS tentacles))) (SBAR (WHNP (WDT that)) (S (VP (VBP emerge) (PP (IN from) (NP (PRP$ its) (NN head))))))))))))) (. .)))