Task: Text Simplification
Input (English): it is associated chiefly with the holiday halloween , and was named after the phenomenon of strange light flickering over peat bogs , called ignis fatuus or jack-o ' -lantern.
Output (English): named after those unexplained occurences of strange light flickering over peat bogs , called ignis fatuus or jack-o ' -lantern , it is mainly thought of as part of the holiday , halloween.