PERSON@1 taught philosophy , as a Privatdozent at LOCATION@1 from NUMBER@1 , then as professor , first at LOCATION@2 from NUMBER@2 , then at LOCATION@3 im LOCATION@4 from NUMBER@3 until his NUMBER@4 retirement .

Then PERSON@1 taught philosophy , as a Privatdozent at LOCATION@1 from NUMBER@1 , and as a professor : first at LOCATION@2 from NUMBER@2 , then at LOCATION@3 im LOCATION@4 from NUMBER@3 until his NUMBER@4 retirement .
