original: between 1898 and 1901 he was a choral coach and subsequently an assistant conductor at the bayreuth festival .
simplifications: he was a choral coach and eventually an assistant conductor at the bayreuth festival between 1898 and 1901 . between 1898 and 1901 he was a choral coach and subsequently an assistant conductor at the bayreuth festival . between 1898 and 1901 he was a singing coach and afterward an assistant guide at the bayreuth festival . between 1898 and 1901 he was a choral coach and became an assistant conductor at the bayreuth festival . between 1898 and 1901 he was a choral coach and then an assistant conductor at the bayreuth festival . between 1898 and 1901 he was a choral coach and later an assistant conductor at the bayeuth festival . he was a choral coach and subsequently an assistant conductor at the bayreuth festival in between 1898 and 1901 from 1989 to 1901 , he was a choral coach and then an assistant conductor at the bayreuth festival .