In NUMBER@1 , PERSON@1 and PERSON@2 served together as Principal Conductors until , in the course of the season , PERSON@3 was appointed Music Director , becoming the first American-born-and-trained conductor to head the Philharmonic .

In NUMBER@1 , PERSON@1 and PERSON@2 served together as Principal Conductors until , in the course of the season , PERSON@3 was made conductor , becoming the first MISC@1 conductor of the Philharmonic . PERSON@2 was Music Director for NUMBER@2 seasons .
