rtokens: Thousands were killed or imprisoned .
pos: DT NN NNS VBD DT JJS VBN IN DT NN IN DT JJ JJ NNS IN NNP CD WRB DT NN VBN DT NN .
tokens: The street protests were the biggest seen in the capital since the student-led pro-democracry demonstrations of September 1988 when the junta crushed the uprising .
ltokens: The protest culminated at dawn on Tuesday with several hundred students being detained briefly by police in central Rangoon .