2987
A 65-year - old man on warfarin therapy with a sudden spontaneous onset of sub - conjunctival haematoma associated with bloody tears was assessed in the clinic following a referral from an optometrist .
 bloody tears, warfarin; sub - conjunctival haematoma, warfarin
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 bloody tears, warfarin; sub - conjunctival haematoma, warfarin