(S (S (BASENP (JJ Such) (NNS tests)) (VP (VBP are) (VP (VBN designed) (PP (TO to) (VP (VP (VB error) (PP (IN on) (NP (BASENP (DT the) (NN side)) (PP (IN of) (BASENP (NN caution)))))) (COMMA ,) (S (VP (ADVP (RB thus)) (VP (VBG ensuring) (SBAR (IN that) (S (BASENP (JJ possible) (NN poisoning) (NNS victims)) (VP (VBP receive) (NP (BASENP (NN treatment)) (PP (IN in) (BASENP (NN time))))))))))))))) (PERIOD .))