prov:value
| - o constituent phrases and words, conversing, posing questions (true/false, multiple choice, fill-in-the-blank, scrambled sentences to be placed in correct word order, and/or otherwise) to a user and grading the answers, providing games (including language games based on ???Bingo???, ???Concentration???, solving a mystery, and other games), visually annotating displayed text, tracking user progress
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