This is the 1098th most frequent Turkish word.
bunlardan
"Of these" or "from these."
Here, 'bunlardan' points to specific items within 'these' that the speaker has observed.
Bunlardan birkaçını görmüştüm.
I had seen a few of these.
Here, 'bunlardan' signifies a selection among a group of items being referred to as 'these'.
Bunlardan hangisini seçeceksin?
Which one of these will you choose?
In this sentence, 'bunlardan' is used to indicate part of a group, describing 'these' with further specification.