( So ( , ( ( the ( middle term ) ) ( ( combines ( ( ( ( both species ) ( -LRB- ( ( a ( ( more concrete ) genus ) ) -RRB- ) ) ) and ) ( ( the ( single ( individual ( living thing ) ) ) ) ( -LRB- ( ( ( a ( restricted part ) ) ( of ( the Earth ) ) ) -RRB- ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB So)) (, ,) (NP (DT the) (JJ middle) (NN term)) (VP (VBZ combines) (NP (NP (NP (DT both) (NN species)) (PRN (-LRB- -LRB-) (NP (DT a) (ADJP (RBR more) (JJ concrete)) (NN genus)) (-RRB- -RRB-))) (CC and) (NP (NP (DT the) (JJ single) (JJ individual) (VBG living) (NN thing)) (PRN (-LRB- -LRB-) (NP (NP (DT a) (VBN restricted) (NN part)) (PP (IN of) (NP (DT the) (NN Earth)))) (-RRB- -RRB-))))) (. .)))
So, the middle term combines both species (a more concrete genus) and the single individual living thing (a restricted part of the Earth).
(ROOT (S (NP (NNP Individual)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT an) (NN organism)) (, ,) (CC or) (NP (JJ single) (VBG living) (NN thing)))))) (. .)))