Response from Overpass API.
Consists of a list of nodes, ways and relations.
t() :: %Overpex.Response{nodes: [%Overpex.Node{id: term, lat: term, lon: term, tags: term}], relations: [%Overpex.Relation{id: term, members: term, tags: term}], ways: [%Overpex.Way{id: term, nodes: term, tags: term}]}