Simplify the following text for a Grade 6 native English-speaking person.
Original: Analysis of her visions is problematic since the main source of information on this topic is the condemnation trial transcript in which she defied customary courtroom procedure about a witness 's oath and specifically refused to answer every question about her visions .
Simplified: When Joan of Arc was put on trial , she said no to the customary courtroom rules about a witness 's oath . She said she would not answer every question about her visions .