Assertion: caffeine's side effect | /r/HasProperty | headache
Facets:
Source sentences:
text: These side effects can range from mild to serious and include headache, nervousness, sleep problems, vomiting, diarrhea, irritability, irregular heartbeat, tremor, heartburn, dizziness, ringing in the ears, convulsions, and confusion.
text: Some potential side effects of too much caffeine can include restlessness, irritability, inability to fall asleep, frequent urination, fast heartbeat and headaches.