List01={{"L1","Sub1"}, {"L2","Sub2"}, {"L3","Sub3"}},
t_Position_1 = List.PositionOf(List01, "L2", Occurrence.First, (current, value) => value = current{0}),
Value_1=List01{t_Position_1}{1},
List02={{1,"Sub10"}, {2,"Sub20"}, {3,"Sub30","Sub31","Sub32"}},
t_Position_2 = List.PositionOf(List02, 3, Occurrence.First, (current, value) => value = current{0}),
Value_2=List02{t_Position_2}{2},