Simplify the following text for a Grade 10 native English-speaking person.
Original: In 1922 , he wrote the novel Un Ollo de Vidro and in 1924 he joined the SeminÃ rio de Estudos Galegos ( `` Seminar of Galician Studies '' ) and founded the Coral PolifÃ nica de Pontevedra ( `` Pontevedra Polyphonic Choir '' ; as he was an amateur musician ) .
Simplified: In 1922 , he wrote the novel Un Ollo de Vidro and in 1924 he joined the Seminario de Estudos Galegos and founded the Coral Polifonica de Pontevedra .