( Sensory ( ( adaptation ( and ( muscle fatigue ) ) ) ( ( ( ( ( cause ( a change ) ) ( in ( ( the strength ) ( of behavior ) ) ) ) but ) ( ( are not ) ( considered learning ) ) ) . ) ) )
(ROOT (S (ADVP (RB Sensory)) (NP (NN adaptation) (CC and) (NN muscle) (NN fatigue)) (VP (VP (VBP cause) (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN strength)) (PP (IN of) (NP (NN behavior)))))) (CC but) (VP (VBP are) (RB not) (VP (VBN considered) (S (VP (VBG learning)))))) (. .)))
Sensory adaptation and muscle fatigue cause a change in the strength of behavior but are not considered learning.
(ROOT (S (NP (JJ Learned) (NN behavior)) (VP (VBZ is) (ADJP (JJ adaptive)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP are) (ADJP (JJ flexible)) (, ,) (S (ADJP (JJ capable) (PP (IN of) (S (VP (VBG changing) (SBAR (IN if) (S (NP (DT the) (NN environment)) (VP (VBZ changes))))))))))))) (. .)))