For the moment, it is impossible for a company to have more than one
entity atached to it.
because of field entity_id
"company_entity_id_fkey" FOREIGN KEY (entity_id) REFERENCES entity(id)
Would it be possible in 1.5 to have Company without field entity_id ?
Then we could have a company that at the same time can be
employee (half-time employee with own business)