Swedish uses the det är construction very, very frequently. It always defaults to det unless you have already been explicit about what you mean, and often even then.
Also, please note that Swedish doesn't have masculine and feminine genders. The word egendom is of the so-called common gender, which is the result of a merge between masculine and feminine many centuries ago.
I had a 77 Day streak on Duolingo with just studying Swedish but today I opened my Duolingo app and a message popped up telling that I need to make an exercise in order to mantain my streak.
As I closed the message, I tried to click on an exercise but the same message popped up from the left to the right to the middle of the window. I closed it and it appeared again it wont stop.
So I decided to open my Google Chrome on my smartphone and went to the Duolingo website. From there I logged in and made an exercise, as I proceed I got one Day streak, all of a sudden - All my effort disappeared! Now I have to do it all over again, there is no way to recuperate the 77 day streak...