Question: who made the discovery of both the oxygen and some halogen element?
Topic entities:
Oxygen: m.025s6bf
Halogen: m.03gcp
Logical form: (AND chemistry.element_discoverer (AND (JOIN (R chemistry.chemical_element.discoverer) (JOIN (R chemistry.chemical_series.elements) m.03gcp)) (JOIN (R chemistry.chemical_element.discoverer) m.025s6bf)))
Actions:
get_relations(m.03gcp)
get_neighbors(m.03gcp,chemistry.chemical_series.elements)
get_relations(#0)
get_neighbors(#0,chemistry.chemical_element.discoverer)
get_relations(m.025s6bf)
get_neighbors(m.025s6bf,chemistry.chemical_element.discoverer)
intersection(#1,#2)
Answer:
answer_argument: m.0g68n
entity_name: Carl Wilhelm Scheele