全句：A quiet day's fishing,or eight hours in a cinema seeing the same film over and over again,is usually as far as they get.A quiet day's fishing 语法结构如何理解?

全句：A quiet day's fishing,or eight hours in a cinema seeing the same film over and over again,is usually as far as they get.
A quiet day's fishing 语法结构如何理解?

"A quiet day's fishing,or eight hours in a cinema seeing the same film over and over again," 是整个句子的主语.
"A quiet day's fishing" 是一个名词成分的词组.中心词是"fishing"."A quiet day's"是定语修饰"fishing".