I'm reading Animal Farm and having this question... Here's the sentence: They tiptoed up to the house, and such animals as were tall enough peered in at the dining-room windows. I can understand it means: Tall animals could peer in at the dining-room windows. But as for the part "such animals as were tall enough" , I can't figure out the structure here. I mean what's the usage of "such as" ? Could you give me some examples just like this sentence? thank you!