GWALABASTI — When Mamata Yadav was a little girl, she dreamt of going to college one day. She loved studying and enjoyed going to school. At the age of 27, she is believed to be the most educated among 250 women in Gwalabasti hamlet of Mechinagar municipality, located in southeastern Nepal on the border with India. But she did not go to college. Yadav’s education stopped at eighth grade. She wanted to continue her studies, but faced a natural barrier. Like others, she and her older brother forded the Mechi River to get to school. But while she passed her classes, her brother did not. Without h…