that is a modern museum ..................as we have discussed in similar cases should be accepted
This comment isn't meant for this sentence, but because I can't leave the comment to the right sentence and Help section won't let leave feed back, I guess this is the only way to this fixed:
When strengthening the section Places Duolingo won't grade and let continue after I translate "the cinema" to "το σινεμά" (pictures of movies included to the page). It gets stuck there no matter how many times I try to grade it. could you fix that bug?"