#### Column names for Character Dataframe
- subject: Subject name or ID (derived from filename)
- trial_id: Trial ID
- condition: Condition (if applicable)
- item: Item ID
- index: 
- letternum: Number of the character
- char: The character
- char_xmin: x start position (in pixel)
- char_ymin: y start position (in pixel)
- char_xmax: x end position (in pixel)
- char_ymax: y end position (in pixel)
- char_y_center: x center position (in pixel)
- char_x_center: y center position (in pixel)
- assigned_line: Line of text the character belongs to
- in_word_number: Number of word the character belongs to
- in_word: Word the character belongs to
- num_letters_from_start_of_word: Number of characters since the start of the word
- in_sentence_number: Number of sentence the character belongs to
- in_sentence: Sentence the character belongs to
- letline: Character position from start of line
- wordline: Word position from start of line for the word the character belongs to
- wordsent: Word position from start of the sentence for the word the character belongs to
- letword: Character position from start of word starting from space before word