Original sentence: Daytime naps may occur with or without warning and may be irresistible.Episodes may be triggered by sudden emotional reactions such as laughter, anger, surprise, or fear, and may last from a few seconds to several minutes.In addition, night-time sleep may be fragmented with frequent wakenings.The other symptoms may begin alone or in combination months or years after the onset of the daytime naps.These naps can occur several times a day
Edited sentence: Attacks may be triggered by sudden emotional reactions such as laughter, anger, surprise, or fear, and may last from a few seconds to several minutes.Daytime sleep attacks may occur with or without warning and may be irresistible.In addition, nighttime sleep may be fragmented with frequent wakenings.The other symptoms may begin alone or in combination months or years after the onset of the daytime sleep attacks.These attacks can occur repeatedly in a single day