Complex sentence: Two weeks later Duckwitz flew to Stockholm, ostensibly to discuss about passage of German merchant ships, contacted Prime Minister Per Albin Hansson and queried whether Sweden would be willing to receive Danish Jewish refugees.
Split into simpler sentences: Two weeks later Duckwitz flew to Stockholm, ostensibly to discuss the passage of German merchant ships. While there, he contacted Prime Minister Per Albin Hansson and asked whether Sweden would be willing to receive Danish Jewish refugees.