( This ( ( is ( ( a ( ( mutually beneficial ) relationship ) ) ( where ( ( ( the hyphae ) ( of ( the fungus ) ) ) ( ( ( ( grow around ) ( ( the roots ) ( of trees ) ) ) , ) ( ( ( ( ( enabling ( the ( fungus ( to ( receive ( ( moisture ( , ( protection ( and ( nutritive byproducts ) ) ) ) ) ( of ( the tree ) ) ) ) ) ) ) ) , ) and ) ( affording ( the tree ) ) ) ( ( greater access ) ( to ( soil nutrients ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (DT a) (ADJP (RB mutually) (JJ beneficial)) (NN relationship)) (SBAR (WHADVP (WRB where)) (S (NP (NP (DT the) (NN hyphae)) (PP (IN of) (NP (DT the) (NN fungus)))) (VP (VBP grow) (PRT (RP around)) (NP (NP (DT the) (NNS roots)) (PP (IN of) (NP (NNS trees)))) (, ,) (S (VP (VP (VBG enabling) (NP (DT the) (NN fungus) (S (VP (TO to) (VP (VB receive) (NP (NP (NN moisture) (, ,) (NN protection) (CC and) (NN nutritive) (NNS byproducts)) (PP (IN of) (NP (DT the) (NN tree))))))))) (, ,) (CC and) (VP (VBG affording) (NP (DT the) (NN tree))) (NP (NP (JJR greater) (NN access)) (PP (TO to) (NP (NN soil) (NNS nutrients))))))))))) (. .)))
This is a mutually beneficial relationship where the hyphae of the fungus grow around the roots of trees, enabling the fungus to receive moisture, protection and nutritive byproducts of the tree, and affording the tree greater access to soil nutrients.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN beneficial) (NN relationship)) (VP (VBZ exists) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT a) (JJ certain) (NN type)) (PP (IN of) (NP (NP (NN tree) (POS 's)) (NNS roots)))) (VP (VBP need) (S (NP (DT a) (NN fungus)) (VP (VB present) (SBAR (IN in) (NN order) (S (VP (TO to) (VP (VB grow) (ADVP (RB normally)))))))))))) (. .)))
A(n) beneficial relationship exists when a certain type of tree’s roots need a fungus present in order to grow normally.