Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Commander Tucker:  I 'm getting punchy .
Dr. Phlox: Why are n't you getting together with T'Pol to get your neural nodes stimulated ? Too intimate ?
Commander Tucker: Nah , I do n't have an hour a night to waste in T'Pol 's quarters . Is n't there something else I could do .
Dr. Phlox: There is Alderberan mud leeches .
Commander Tucker: What the hell am I supposed to do with those ?
Dr. Phlox: Place _ one _ on your chest and one on your abdomen an hour before going to bed . Their secretions act as a natural sedative . Oh , uh , please be careful to sleep on your back . If you roll over , you might anger them .
Commander Tucker: Maybe an hour a night with T'pol is n't so bad .

leeches