"ooTextFile"
"TextGrid"
0 2.3 ! time domain of TextGrid
<exists>
3 tiers
"IntervalTier" "Mary" ! type and name of tier 1
0 2.3 ! time domain of tier 1
1 interval coming
0 2.3 "" ! interval 1 on tier 1
"IntervalTier" "John" ! type and name of tier 2
0 2.3 ! time domain of tier 2
1 interval coming
0 2.3 "" ! interval 1 on tier 2
"TextTier" "bell" ! type and name of tier 3
0 2.3 ! time domain of tier 3
0 points coming