(S (S (PP (RB Instead) (PP (IN of) (S (VP (VBG pursuing) (NP (BASENP (DT the) (NN idea)) (PP (IN of) (S (VP (VP (VP (VBG using) (BASENP (NNS cameras) (CC or) (NNS microchips))) (PP (IN in) (BASENP (DT the) (NN ball)))) (S (VP (TO to) (VP (VB see) (SBAR (IN if) (S (BASENP (PRP it)) (VP (VBZ has) (VP (VBN crossed) (BASENP (DT the) (NN goal-line))))))))))))))))) (COMMA ,) (S (BASENP (DT the) (NNP International) (NNP Board)) (VP (VBZ wants) (S (VP (TO to) (VP (VB see) (SBAR (IN if) (S (NP (BASENP (DT the) (NN introduction)) (PP (IN of) (BASENP (NN two) (JJ extra) (JJ assistant) (NNS referees)))) (VP (MD can) (VP (VB improve) (NP (BASENP (DT the) (NN quality)) (PP (IN of) (NP (BASENP (NN referee) (POS 's)) (NNS decisions)))))))))))))) (PERIOD .))