With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: In 1973, the Band released "Moondog Matinee", an album of old songs written by non-Band members. There was a tour in support of the album, which garnered no reviews. However on July 28, 1973, they played at the legendary Summer Jam at Watkins Glen, a massive concert that took place at the Grand Prix Raceway outside Watkins Glen, New York. The event, which was attended by over 600,000 music fans, also featured the Grateful Dead and the Allman Brothers Band. It was during this event that discussions began about a possible tour with Bob Dylan, who had —along with Robertson—moved to Malibu, California. By late 1973, Danko, Helm, Hudson and Manuel had joined them, and the first order of business was backing Dylan on the album "Planet Waves". The album was released concurrently with their joint 1974 tour, in which they played 40 shows in North America during January and February 1974. Later that year, the live album "Before the Flood" was released, which documents the tour.
text_B: Is it likely that a die-hard fan of the Band in 1974 would have a t-shirt from the Moondog Matinee tour?
YES.