(S (S (S (NP (BASENP (DT The) (NNS techniques)) (VP (VBN developed) (PP (IN by) (NP (BASENP (NNP Ott)) (CC and) (NP (BASENP (DT the) (NN team)) (PP (IN of) (BASENP (NNS researchers)))))))) (VP (ADVP (RB still)) (VP (VBP have) (S (VP (TO to) (VP (VB be) (VP (ADVP (RB further)) (VBN researched)))))))) (SBAR (IN before) (S (BASENP (PRP it)) (VP (MD can) (VP (VB be) (VP (VBN applied) (PP (IN for) (NP (BASENP (NN use)) (PP (IN in) (BASENP (NNS humans))))))))))) (PERIOD .))