An Indiana museum plans to sell a work of glass art by Pablo Picasso that sat unnoticed in storage for nearly 50 years. The Evansville Museum says the piece titled "Seated Woman with Red Hat" was donated to the museum in 1963. Museum officials say it was cataloged as art inspired by a design for a Picasso painting and mistakenly credited to an artist named Gemmaux. That name turned out to be plural for "gemmail," the type of glass used in the work. Its worth isn't known yet.