Answer:
A knowledge-based system (KBS) is a form of artificial intelligence (AI) that aims to capture the knowledge of human experts to support decision-making. Examples of knowledge-based systems include expert systems, which are so called because of their reliance on human expertise.
À usually means 'to' or 'at' and can be used to refer to nouns and timings. Au is the masculine form of à and is used in place of à to refer to masculine nouns (but not proper names). En means 'in' and is also used to refer to nouns.
a) Nous n'avons pas de classe en mai.
b) Il finit la classe à midi.
c) Au printemps, il y a des fleurs.
d) Le professur comence la classe à 9 heures.
e) En hiver, la neige tombe.
f) La rentrée de l'école est au mois de juin.
g) En automne, il pleut.
h) En été, il fait beau et chaud.
