Assess the valence intensity of the tweet "DON'T CARE DON'T CARE DON'T CARE DON'T CARE DON'T CARE DON'T CARE DON'T CARE DON'T CARE DON'T CARE DON'T CARE #royalwedding" based on the mood of the author. Offer a numerical rating between 0 and 1, with 1 representing highly positive and 0 representing highly negative.