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が明らかになった

became clear

→ が
phrase Rare #39,028
became clear The が marks what became clear or was revealed.
JA: 調査の結果、新しい事実が明らかになった。
EN: The investigation revealed a new fact.

新たな事実が明らかになった。

A new fact has come to light.

彼女がうそをついていたことが明らかになった。

It became clear that she had been lying.

ついに、その真相が明らかになった。

At last, the truth came to light.