Read the bio below and try to give details on john m. lipski 's:    - caption       - university     - name     - nationality     - occupation     Bio: john m. lipski is an american linguist who is most widely known for his work on spanish and portuguese dialectology and language variation . his research also focuses on spanish phonology , the linguistic aspects of bilingualism and code-switching , african influences on spanish and portuguese , and pidgin and creole studies . he is currently the edwin erle sparks professor of spanish linguistics in the department of spanish , italian , and portuguese at the pennsylvania state university . he previously served as the head of the same department from 2001 to 2005 .
The answer to this question is:
- caption is edwin and portuguese erle sparks professor of spanish , italian ,- university is the pennsylvania state university- name is john m. lipski- nationality is american- occupation is linguist