File type = "ooTextFile"
Object class = "TextGrid"

xmin = 0 
xmax = 1 
tiers? <exists> 
size = 3 
item []: 
    item [1]:
        class = "IntervalTier" 
        name = "Mary" 
        xmin = 0 
        xmax = 1 
        intervals: size = 1 
        intervals [1]:
            xmin = 0 
            xmax = 1 
            text = "" 
    item [2]:
        class = "IntervalTier" 
        name = "John" 
        xmin = 0 
        xmax = 1 
        intervals: size = 1 
        intervals [1]:
            xmin = 0 
            xmax = 1 
            text = "" 
    item [3]:
        class = "TextTier" 
        name = "bell" 
        xmin = 0 
        xmax = 1 
        points: size = 0 
