The British government has indicated its readiness to allow Argentine companies to take part in the development of oilfields in the Falkland islands' territorial waters- provided they acknowledge that any oil extracted belongs to Britain.
The British government has made deals with the government of Brazil. 
The passage focuses on Argentine companies, not Brazil so there is no way to know what it has done with Brazil. 
( z1 deal :ARG0 ( z2 government-organization :ARG0-of ( z3 govern :ARG1 ( z4 country :name ( z5 name :op "Britain" ) ) ) ) :ARG1 ( z6 government-organization :ARG0-of ( z7 govern :ARG1 ( z8 country :name ( z9 name :op "Brazil" ) ) ) ) )