Question: How was Grace killed the the plot. If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Aenigma Context: At St. Mary's College, a boarding school for girls located just outside Boston, Massachusetts, a lonely, gaunt, unattractive student, named Kathy (Milijana Zirojevic), becomes the center of a cruel practical joke perpetrated by a gang of students and the hunky, but sadistic gym teacher, Fred Vernon (Riccardo Acerbi). Kathy is tricked into going on a date with Mr. Vernon, but when she over eagerly makes her move onto him in his parked car in the woods, the students appear in their cars to taunt her. Running away from several carloads of her tormentors, Kathy runs onto a busy street where she immediately gets hit by an oncoming car and is admitted to the local hospital in a coma. Kathy's strange mother, Mary, continues to gloom around the school in her capacity as a cleaner. Some time later, a new girl named Eva Gordon (Laura Naszinski), arrives at the school where she is shown around by the stern headmistress Miss Jones, and given Kathy's old room. Eva becomes acquainted with several of the perpetrators of the stunt. It is soon revealed (to the viewers only) that Eva is Kathy. Eva has somehow been possessed by the spirit of the comatose Kathy who begins using supernatural powers of telekinesis and magic to exact revenge against all those involved in the prank that put her in a coma. The first victim is Mr. Vernon, whom asks Eva on a date. That night while waiting for Eva to show up at the gym for their secret rendezvous, the narcissist Mr. Vernon is attacked and strangled by his own reflection when it jumps out of a mirror. The following morning, the police detective on the scene (director Lucio Fulci) concludes that Mr. Vernon died of a heart attack. The following night, Virginia Williams (Kathi Wise), one of the students involved in the prank against Kathy, is attacked in her bed and suffocated to death by an onslaught of snails that appear and then disappear. Again the police do not have any explanation for the mysterious death. Meanwhile, the neurologist in charge of Kathy's case, Dr. Robert Anderson...
The answer to this question is:
A marble statue comes to life and crushes her to death