1.They are talking about a story Mr.Wren wrote, a story about a spavined horse.

1.他们正在谈生写一故事，一匹故事。

2.They are not talking about a story Mr.Wren wrote, a story about a spavined horse.

2.她们正在谈男士写唯一古代事件，一匹古代事件。