Based on the text, summarize who is Marina Vishmidt

Context: Marina Vishmidt is an American writer, editor and critic. She lectures at the Centre for Cultural Studies at Goldsmiths, University of London in the MA program Culture Industry, and teaches Art Theory in the MA Art Praxis at the Dutch Art Institute in Arnhem. Her research mainly concerns the relationship between art, value and labour. She further explores this through works on debt, social reproduction and artistic entrepreneurialism. In 2013, she completed her PhD entitled 'Speculation as a Mode of Production in Art and Capital' at the Queen Mary University of London.

Answer: Summary about Marina Vishmidt:

-  She is an American writer, editor and critic. 
- Lecturer at the Centre for Cultural Studies at Goldsmiths, University of London in the MA program Culture Industry, and teaches Art Theory in the MA Art Praxis at the Dutch Art Institute in Arnhem. 
- She researches about  the relationship between art, value and labour.