( That ( ( ( ( includes ( ( ( birds ( -LRB- ( ( which ( descended ( from dinosaurs ) ) ) -RRB- ) ) ) ( but not ) ) mammals ) ) ( -LRB- ( ( which ( evolved ( from ( mammal-like reptiles ) ) ) ) -RRB- ) ) ) ( ( or ( , ( curiously ( , ( ( ( Mesosaurs ( -LRB- ( ( ( a group ) ( of ( ( extinct aquatic ) reptiles ) ) ) -RRB- ) ) ) , ) ( both groups ) ) ) ) ) ) ( ( having ( ( diverged ( from ( the ( reptilian lineage ) ) ) ) ( before ( ( the ( common ancestor ) ) ( of ( recent reptiles ) ) ) ) ) ) evolved ) ) ) . ) )
(ROOT (S (NP (DT That)) (VP (VBZ includes) (NP (NP (NP (NNS birds)) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT which)) (S (VP (VBD descended) (PP (IN from) (NP (NNS dinosaurs)))))) (-RRB- -RRB-))) (CONJP (CC but) (RB not)) (NP (NNS mammals)))) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT which)) (S (VP (VBN evolved) (PP (IN from) (NP (JJ mammal-like) (NNS reptiles)))))) (-RRB- -RRB-)) (SBAR (PRN (CC or) (, ,) (ADVP (RB curiously)) (, ,) (NP (NP (NP (NNP Mesosaurs)) (PRN (-LRB- -LRB-) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (ADJP (JJ extinct) (JJ aquatic)) (NNS reptiles)))) (-RRB- -RRB-))) (, ,) (NP (DT both) (NNS groups)))) (S (S (VP (VBG having) (VP (VBN diverged) (PP (IN from) (NP (DT the) (NN reptilian) (NN lineage))) (PP (IN before) (NP (NP (DT the) (JJ common) (NN ancestor)) (PP (IN of) (NP (JJ recent) (NNS reptiles)))))))) (VP (VBD evolved)))) (. .)))
That includes birds (which descended from dinosaurs) but not mammals (which evolved from mammal-like reptiles) or, curiously, Mesosaurs (a group of extinct aquatic reptiles), both groups having diverged from the reptilian lineage before the common ancestor of recent reptiles evolved.
(ROOT (S (NP (NNP Birds)) (VP (VBD evolved) (PP (IN from) (NP (JJ reptile) (NNS ancestors)))) (. .)))