This is the 10356th most frequent Turkish word.
binalarda
"In the buildings"
In this sentence, 'binalarda' is used to describe the location ('in/on the buildings') where libraries are commonly situated.
Kütüphaneler genellikle büyük binalarda bulunur.
Libraries are usually found in large buildings.
Here, 'binalarda' expresses the place ('in buildings') where the activity of playing by children should be avoided.
Çocuklar binalarda oynamamalıdır çünkü güvenli değildir.
Children should not play in buildings as it is not safe.
The word 'binalarda' in this sentence specifies the location ('in the buildings') where people were during the event described.