We would like you to assess the QUALITY of each of the following argument (discussing Gay Marriage) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of gay marriage. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gay marriage.

Example Input: *SOAWatch, a movement to challenge American foreign policy and its support for tyrants in Latin America, by calling annual attention to the School of the Americas which trains fascist terrorists.
Example Output: Invalid

Example Input: In either case, it is a weak argument for the RC being anti-gay, since homosexual sex is just one of a hundred or so "risk factors" that disqualify one from donation.
Example Output: Valid

Example Input: Marriage is a right for all people, as declared by the constitution.
Example Output:
Valid