[10, 4465, 1025960, 5413, 1456, 1299646, ...] ⁃ 10: [0.1, 0.5, 0.2, 0.2, 0.35, ...] ⁃ 4465: [0.9, 0.8, 0.4, 0.1, 0.2, ...] ⁃ 1025960: [0.45, 0.2, 0.2, 0.6, 0.9, ...] ⁃ 5413: [0.8, 0.8,0.1, 0.2, 0.5, ...] ⁃ 1456: [0.7, 0.3, 0.7, 0.3, 0.2, ...] ⁃ 10: [0.0, 0.0, 0.0, ...., 0.3, 0.1, 0.9, .., 0.0, 0.0, 0.0] ⁃ 4465: [0.3, 0.6, 0.1, …., 0.0, 0.0, 0.0, ..., 0.0, 0.0, 0. ⁃ 1025960: [0.0, 0.0, 0.0, ..., 0.0, 0.0, 0.0, ..., 0.7, 0.3, 0.1] ⁃ 5413: [0.9,0.1,0.1,....,0.0, 0.0,0.0, ..., 0.0, 0.0, 0.0] ⁃ 1456: [0.0, 0.0, 0.0, ..., 0.0, 0.0, 0.0, ..., 0.2, 0.2, 0.6 mid: [0.1, 0.2, 0.1, … 0.3, 0.1, 0.8, …, 0.1, 0.6, 0.4] mid: [0.5, 0.3, 0.2, 0.9, 0.8] fastText GMM Accumulate dimensionality reduction (PCA with matrix sketching) y-sparse-features (typically 6,000 dimension) y-dense-features (typically 400 dimension)