Specifying different vocabularies for @type and property names

Given a json-ld document like the following, is it possible to specify a
context such that the types and property names get prefixed with different
base urls?

{
  "@type": ["organism", "item"],
  "@id": "/organisms/human",
  "name": "human",
  "scientific_name": "Homo sapiens",
  "taxon_id": "9606"
}

Laurence