This is the 967th most frequent French word.
supplémentaire
Additional.
Here, 'supplémentaire' is an adjective describing the noun 'informations', signifying that extra or additional information was requested.
J'ai demandé des informations supplémentaires sur le sujet.
I asked for additional information on the topic.
In this context, 'supplémentaire' is used as an adjective modifying 'commentaire', indicating that the comment is an extra one added to the previous contributions.
Il a ajouté un commentaire supplémentaire à la fin de la réunion.
He added an additional comment at the end of the meeting.
The word 'supplémentaires' serves as an adjective that modifies the noun 'sièges', signaling that these seats are more than originally planned or provided.