dann

1. then, after that
2. then, in that case

lehrte

1. inflection of lehren:
2. inflection of lehren:

als

1. at (approximately) the same moment; when; while; as
2. than
3. To the same degree that, as (distinguished from the aforementioned use in that comparison was between equals)
4. as; like; in the function of; in the form of
5. as if
6. but, other than

Professor

professor

für

1. for
2. in favor of, in support of
3. by the standards of
4. on behalf of
5. kind / type of
6. (informal) instead of
7. (colloquial) in order to

Geschichte

1. history
2. story

an

• Prep

  1. on; upon; at; in; against
  2. by; near; close to; next to
  3. on; in; at
  4. a; per; only used with the word Tag (“day”), otherwise use in

• Adv
• Adj

der

• Article

  the

• Pron
• Pron
• Pron
• Pron