Task: Quantify the valence intensity of the snippet, assigning it a value between 0 (highly negative) and 1 (highly positive), reflecting the emotional tone conveyed.
Snippet: Sometime in the 1920's, a rich New Yorker named Abby Aldrich Rockefeller started an art collection that was based, a son wrote, ''on her own instincts and interests.''
Intensity score: 