If the recording now playing on the jazz program is really Louis Armstrong recorded in concert in 1989,  as the announcer said, then Louis Armstrong was playing some of the best jazz of his career years after his death
Since the trumpeter was definitely Louis Armstrong, somehow the announcer must have gotten the date of the recording wrong
Unless Kathe Kollwitz was both a sculptor and a printmaker, the volunteer museum guide is wrong in his attribution of this sculpture. Since what Kollwitz is known for is her prints, the guide must be wrong.