sentences:  This hypothesis has not yet been generally accepted among linguists.For 10 years, Holt served as secretary-treasurer of the Endangered Language Fund, from its founding, in 1996, until 2006; he also designed the logo of the organization, which, with some additional stylization, is still used.As an educator, Holt has taught language-related courses at a number of institutions of higher learning in the U.S., including Southern Connecticut State University, Roger Williams University, Central Connecticut State University, Southeastern Massachusetts University (now the University of Massachusetts Dartmouth), Quinnipiac University, and the University of Montana.