Given the task definition and input, reply with output. We would like you to classify each of the following sets of argument pairs (discussing Gay Marriage)  into either SIMILAR or NOT SIMILAR. A pair of arguments is considered SIMILAR if the arguments are about the same FACET (making the same argument), and is considered NOT SIMILAR if they do not have the same FACET. A FACET is a low level issue that often reoccurs in many arguments in support of the author's stance or in attacking the other author's position.

Sent1: So what compelling reason does the government have for allowing gay marriage and NOT allowing incestuous marriages?
 Sent2: concerning homosexual marriage, allowing this type of legal union also raises the question of multiple partner marriages, or marriage of siblings/close family.

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