sentences: more dense compression sinking on frogs that are more dense
docs: mixed_forest_e2 is canopy_closure_moderate. compression is shrinking. mixed_forest_e4 is canopy_closure_congested. frogs has bones ceratophrys is frog. megastomatohyla is tree_frog. pollywog is immature_frog. mutant_frogs has legs_growing_out_of_butts dense_leaved_elodea is waterweed. grass_frog is true_frog.