N4 — outside your level filter
のこと
about N — widens a noun to the whole matter of it, or the whole person
会議のことは、あとでメールで連絡します。
kaiginokoto wa, ato de meeru de renraku shimasu.
I'll let you know about the meeting by email later. neutral
あの人のこと、まだ好きなの？
ano hito no koto, mada suki na no?
Do you still have feelings for him? casual