The stuff was strong, but somewhat brittle.
( ( The stuff ) ( ( was ( ( ( strong , ) but ) ( somewhat brittle ) ) ) . ) )
(ROOT (S (NP (DT The) (NN stuff)) (VP (VBD was) (ADJP (ADJP (JJ strong)) (, ,) (CC but) (ADJP (RB somewhat) (JJ brittle)))) (. .)))
The plaster was strong, yet brittle.
( ( The plaster ) ( ( was ( strong ( , ( yet brittle ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN plaster)) (VP (VBD was) (ADJP (JJ strong) (, ,) (CC yet) (JJ brittle))) (. .)))