Task: Question Answering
Input (English): Question: From what compound and where mainly melatonin is produced ?: 
 Options:  <1> From tyrosine in the skin. <2> From tryptophan in the skin <3> From tryptophan in the pineal gland. <4> From tyrosine in the pituitary gland. <5> From tyrosine in the pineal gland.
Output (English): 3