9. The method for claim 8 , further comprising: iteratively generating an n-gram data structure based on a second RNN and the set of token data structures, wherein the second RNN propagates the n-gram data structure during the iterative generation of the n-gram data structure; and iteratively generating the segmentation map further based on a plurality of iteratively generated combinations of the image data structure and the n-gram data structure.
10. The method of claim 9 , further comprising: training a long short-term memory (LSTM) neural network based on a training data that includes a plurality of other n-grams; and employing the trained LSTM as the second RNN.