Who discovered the chemical elements Potassium, Sodium and Calcium?
who discovered the chemical elements potassium, sodium and calcium
FreebaseQA-train-3724.P0 FreebaseQA-train-3724.P1 FreebaseQA-train-3724.P2
calcium potassium sodium
calcium potassium sodium
m.025tkqy m.025s7j4 m.025sf0_
chemistry.chemical_element.discoverer chemistry.chemical_element.discoverer chemistry.chemical_element.discoverer
m.03qpj
humphry davy
m.03qpj
humphry davy
m.03qpj
humphry davy