関係代名詞が目的格

This is a CD (that)I bought yesterday

関係代名詞のあとにbe動詞などが続くとき

He was the victim (who was) involved in the conspiracy.

There is ~, Here is ~ の主格

Was there anyone (that) could predict the occurrence of the massive earthquake?
「誰かその巨大地震の発生を予測できた人はいたのですか。」

Here is a new strategy (which) brings us a victry.
「これがわれわれに勝利をもたらす新しい戦略だ。」