Logic Problem

• The person who gave 21 flowers is not named Sean or Borris.
• Ralph, and O'Neal often watch fights at the graphic artist's place.
• The coat check person isn't Ralph or the person who gave 11 flowers.
• The person who gave 21 flowers, Borris and Ralph all went to the Ralph, Iverson, and George were not the person who gave 11 flowers.
• Ralph, Iverson, and George were not the person who gave 11 flowers.
• Sean, who is not Borris, is the coat check person's cousin.
• George and Iverson once dated the delivery person.
• The person who gave 4 flowers, O'Neal, and the delivery person have known each other for years.
• The undergraduate student isn't George O'Neal.
• George, Borris, and the person who gave 19 flowers each had different dinners last night.
• Sean is not the person who gave 4 flowers, nor has the last name O'Neal.
• The undergraduate student, who gave 4 flowers, isn't Borris.
• Ralph, O'Neal, and Sean were not the person who gave 11 flowers.
• The coat check person, the person who gave 21 flowers, didn't want a copy of Borris's book.
• Xena, the person who gave 19 flowers, and the undergraduate student go shopping together on Saturdays.
• Xena went with Harris to the amusement park one day. The person who was the graphic artist. All four people are mentioned in this clue.
• The graphic artist, who gave 19 flowers, isn't O'Neal.
• The undergraduate student isn't Sean Iverson.
• The graphic artist, whose first name is Sean, wasn't the person who gave 11 flowers.