In this task, you are given a paragraph, event and an entity. The event is part of the given paragraph and it changes the state of the entity. Your task is to classify the state of the entity into three classes: 1) not exist, 2) unknown location and 3) known location. "not exist" means the entity doesn't exist in that state anymore. "unknown location" means the entity exists in that state but location is unknown. "known location" means the entity exists and location is known.

[Q]: "process paragraph : : The inner portion of the ring is formed during rapid spring growth. The tree's growth slows as the seasons change. The ring's outer growth is more dense. The growth of the tree pushes out the bark of the tree. The tree stops growing quickly in the winter. This seasonal "pause" in growth results in distinct rings in certain tree types. ", "event : The tree's growth slows as the seasons change.", "entity : bark"
[A]: known location

[Q]: "process paragraph : : A radioisotope has unstable nuclei that does not have enough binding energy to hold the nucleus together. Radioisotopes would like to be stable isotopes so they are constantly changing to try and stabilize. In the process, they will release energy and matter from their nucleus and often transform into a new element. This process, called transmutation, is the change of one element into another as a result of changes within the nucleus. He radioactive decay and transmutation process will continue until a new element is formed that has a stable nucleus and is not radioactive. ", "event : Radioisotopes would like to be stable isotopes so they are constantly changing to try and stabilize.", "entity : Radioisotopes"
[A]: unknown location

[Q]: "process paragraph : : Wind and water cause erosion and weathering to the rocks. Eroded rock particles are carried away by wind or by rain, streams, rivers, and oceans. Rock particles sink to the bottom of rivers and oceans creating a layer of sediment. Layers of sediment stack up compacting the bottom layers. Minerals fill in the gaps in the sediment eventuality becoming sedimentary rocks. Rocks buried deep underground exposed to high heat and pressure become metamorphic rock. Metamorphic rocks underground melt to become magma. Magma flows from volcanoes in the form of lava. Lava cools and forms igneous rock. Igneous rock begins being weathered and eroded by water and wind. ", "event : Eroded rock particles are carried away by wind or by rain, streams, rivers, and oceans.", "entity : rocks"
[A]:
unknown location