I want to know the answer to the following question:
The Erfurt Convention recognized the Russian takeover of which formerly Swedish possession?
All the background I'm provided with is that "The two sides reached an agreement, the Erfurt Convention, that called upon Britain to cease its war against France, that recognized the Russian conquest of Finland from Sweden, and that affirmed Russian support for France in a possible war against Austria "to the best of its ability.". Is that enough to answer the question?