"باريس مَدينة فَرَنْسِيّة مُزْدَحِمة."

Translation: Paris is a crowded French city.

[Etiennebln]

Paris is a French crowded city

[Djibril487949]

Confused by choice of endings in the pronunciation here: why /madina/ and not /madinatun/ ("a city")?

[Ina589468]

Why is the correct answer considered wrong in my case. I entered exact the same words in the same order.