Step 1 : Introduction to the question " In our list of 10 of the most haunted cities to spend a weekend, we discover the Congress Plaza Hotel in Chicago, reported to be overflowing with ghosts. What is said to be on the 12th floor of this haunted hotel? "
...1. An unexplained temperature zone, 20 degrees cooler than the other floors. 2. A retired electric chair used on dozens of people wrongly accused. 3. An out-of-use speakeasy where an infamous mob boss was murdered. 4. A sealed room with no doorknob.