Caroling on Main Street Members of Greens Farms Academy’s Harbor Blues, the all-female a capella group, performed carols on Westport’s Main Street today as part of the Westport Downtown Merchants Association’s holiday festivities. (CLICK TO ENLARGE) WestportNow.com photo

Based on that paragraph can we conclude that this sentence is true?
Caroling on Main Street was the first all female caroling group in Westport.
It's impossible to say