Translation:Professor Rania's room is very spacious.
Does not el-istezet literally translate The professor? My translation The professor Rania's room is very spacious, was not accepted because of the The. :(
Yes, you're right. It must've started with the article "THE" here. But I'm afraid, in that way the site will not accept our answer. So you must do what the site says about it. Good Luck for the Arabic Journey!