Repeatedly Minecraft PE players faced with the challenge of finding Spawner spiders. This seed will allow you to quickly find such spawner in the cave. In addition there can be found another 2 chests, containing books for enchanting armor and weapons, as well as a huge amount of rope that useful in most cases.
How to find the cave with spawner? After you load into the world, go straight in that direction:
So you have to go a pretty long time. Then you need to climb a small rock:
At the top you will have to wait for a secret passage in the cave:
Of Spawner can make a lot of automatic farms or used for other personal purposes.