What is the topic of Dylan Mandels previous research?
Dylan Mandels previous research is on Tlingit syntax, specifically The What, When, and Why of S  a Probe into the Alaskan Tlingit Interrogative.
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### Instruction:
What is the topic of Dylan Mandels previous research?

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### Response:
Dylan Mandels previous research is on Tlingit syntax, specifically The What, When, and Why of S  a Probe into the Alaskan Tlingit Interrogative.<|im_end|>