더군요

I noticed, and it struck me

It reports something you saw or found out for yourself, politely and with a note of mild surprise: my daughter was playing on it, the families of the fallen had come, abroad they call it meal prep. It bolts the first-hand observation marker onto the realisation ending, so it is what you say when reality turned out different from what you assumed. The casual equivalent is 더라고.

Register: polite; narration and reporting