Task: Question Answering
Input (English): Question: What two non-protein amino acids participate in the urea cycle ?: 
 Options:  <1> Proline and hydroxyproline. <2> Ornithine and citrulline. <3> Alanine and arginine. <4> Oxalacetate and malate. <5> Serine and GABA.
Output (English): 2