sentences: potassium belongs to alkali metals , group 1 on the periodic table
docs: potassium is metallic_element. potassium is mineral. potassium_phosphate is salt. group_2_elements is alkaline_earth_metals. potassium is element. alkali_metal is metallic_element. potassium_ion is potassium_atom. one_of_chemical_elements is potassium. group_1_elements is alkali_metals. potassium is alkaline_metal.