( Byrd ( also ( ( ( wrote ( of experiments ) ) ( when ( ( behavior ( of animals ) ) ( was ( ( controlled ( by exposure ) ) ( to ( weak ( electromagnetic fields ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Byrd)) (ADVP (RB also)) (VP (VBD wrote) (PP (IN of) (NP (NNS experiments))) (SBAR (WHADVP (WRB when)) (S (NP (NP (NN behavior)) (PP (IN of) (NP (NNS animals)))) (VP (VBD was) (VP (VBN controlled) (PP (IN by) (NP (NN exposure))) (PP (TO to) (NP (JJ weak) (JJ electromagnetic) (NNS fields)))))))) (. .)))
Byrd also wrote of experiments when behavior of animals was controlled by exposure to weak electromagnetic fields.
(ROOT (S (NP (NNP Animal) (NNS behaviors)) (VP (VBP are) (VP (VBN controlled) (PP (IN by) (NP (NP (DT both) (NNS genes) (CC and) (NNS experiences)) (PP (IN in) (NP (DT a) (VBN given) (NN envionment))))))) (. .)))