找一下主句和从句
问题描述：
找一下主句和从句
the Neanderthals appear to equipped to face any obstacle the environment could put in their path,but their relatively sudden disappearance during the Paleolithic era indicates that an inability to adapt to some environmental change led to their extinction.
答
这是个由but连接的转折并列句,前半句的主句是the Neanderthals appear to equipped to face any obstacle 其中主语是Neanderthals,谓语是face,宾语是obstacles.从句是 the environment could put in their path其实是定语从句修饰obstacles的,此处省略了连接词which或者that.
后半句主句是their disappearance indicates .,that 引导的是一个宾语从句,充当indicates 的宾语.