an Entity references as follows:
Angelo Mascheroni (1855 in Bergamo, Italy – 1905) was a pianist composer, conductor, and music teacher, brother of the conductor Edoardo Mascheroni. He is most famous for his "Eternamente" for voice and violin, sung by Enrico Caruso; his two-act opera Il mal d'amore, with a libretto by Ferdinando Fontana, was written in 1898. Among his pupils was Spyridon Samaras. Mascheroni had a son who studied the guitar and mandolin under his father, and appeared as a guitar soloist in London in 1902.