MuseScore name or identity of displayed items in imported XML score

In my MSCZ score of a barbershop-style song, converted from Finale PrintMusic using XML, the words "Tenor" and "Lead" appear above many notes on the upper staff, and the words "Baritone" and "Bass" appear above many notes on the lower staff. These words did not exist or appear in the PrintMusic score. Can anyone identify what these words are in MuseScore terms, so I can remove them as a group or even globally?