What is the fine-grained topic of the following text: Lars-Erik Magnusson, an investor based in Amsterdam who has been active in the European real estate market since the late 1970s, acquired the 26-story 222 N. LaSalle St. building and took possession of the leases in the 25-story 525 W. Monroe St. building. Only return the topic.
Lars-Erik Magnusson's acquisition of buildings in the European real estate market