Complex sentence: She did fieldwork on the intersection of "seers" and humor in San Juan Cotzocon, Mixe, Oaxaca, Mexico in 1974, and worked on the Navajo Nation from 1974-1978 where she developed Navajo-based curriculum and texts in Native American studies.
Split into simpler sentences: She did fieldwork on the intersection of "seers" and humor in San Juan Cotzocon, Mixe, Oaxaca, Mexico in 1974. Beck worked on the Navajo Nation from 1974-1978 where she developed Navajo-based curriculum and texts in Native American studies.