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RER D was created in 1987.
The RER or reseau express regional has5 lines, A, B, C, D and E. They plan to expand E westward by 2020.
RER A was created in 1977.
That is The Rough Endoplasmic Reticulum in a cell. (RER)
The possessive singular of all English nouns is formed by adding -'s: rhinoceros's.