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**Fixed**
- Fixed a critical bug where J-coupling expressions ending with ``Hz`` were incorrectly interpreted as ``ppm``.
- Fixed a critical bug that prevented correct parsing of prior knowledge when there was a space in J-coupling strings, such as "0.125 ppm" and "15 Hz".
- Loosen the bounds of chemical shift of ATP peaks in the attached example prior knowledge datasets of human brain at 7T.
- Updated the ``simple_tutorial.ipynb`` to use the new prior knowledge dataset and the new API.