Task: Question Answering
Input (English): Question: Which of the following antibiotics could be used in a patient with hypersensitivity to penicillin by skin tests ?: 
 Options:  <1> Piperacillin / tazobactam <2> Aztreonam <3> Ampicillin <4> Amoxicillin <5> Ceftazidime
Output (English): 2