Because it was the restaurant’s first night in business, many customers had to wait nearly an hour before they were seated.
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Because it was the restaurant’s first night (which is) in business,
이렇게 중간에 which is가 생략된 게 맞나요?

Because it was the restaurant’s first night in business, many customers had to wait nearly an hour before they were seated.
종속절 구조파악부탁드려요...
혹시 강조구문으로
Because it was the restaurant’s first night (which is) in business,
이렇게 중간에 which is가 생략된 게 맞나요?
