それが何か

what that is

→ 其れ
phrase Uncommon #18,738
what that is Used to ask or refer to the identity or nature of something. In a sentence such as それが何か知っていますか, it means “Do you know what that is?”
JA: それが何か、私にも教えてください。
EN: Please tell me what that is, too.

もう女優それが何か

I'm an actress now. So what?

— オープン・ユア・アイズ (1997)

それが何か

What is that?

— ブレードランナー 2049 (2017)

それが何か見当もつかない

I have no idea what that is.

私にはそれが何かを変えるとは思えない

I don't think it makes any difference to me.

彼が何か隠してるならそれが何か知りたい

If he's hiding something, I'd like to know what it is.

— アトランティス 失われた帝国 (2001)

それが何かわかりません

I don't know what that is.

私はそれが何か知らない

I don't know what it is.