Task: Text Simplification
Input (English): this was followed by the establishment of the grey league -lrb- grauer bund -rrb- , sometimes called oberbund , in 1395 in the upper rhine valley.
Output (English): this was followed by the founding of the grey league -lrb- grauer bund -rrb- , sometimes called oberbund , in 1395 in the upper rhine valley.