#tree| treeid| parentid| childrenid treey |0 |2 1 treey |2 |3 4 9 treey |1 |5 6 7 treey |4 |8 treey |8 |10 11 treey |10 |12 treez |0 | 1 2 treez |2 | 3 4 treeY |0 |2 1 treeY |2 |3 4 9 treeY |1 |5 6 7 treeY |4 |8 treeY |8 |10 11 treeY |10 |12 #treelabel|treeid|nodeid|label treey |0 |x1 treey |1 |a treey |2 |a treey |3 |b treey |4 |c treey |5 |b treey |6 |x4 treey |7 |c treey |8 |a treey |9 |x7 treey |10 |b treey |11 |g treey |12 |nephew treez | 0| foo treez | 1| bar treez | 2| a treez | 3| b treez | 4| c treex |2 |c treeY |0 |x1 treeY |1 |a treeY |2 |a treeY |3 |b treeY |4 |c treeY |5 |b treeY |6 |x4 treeY |7 |c treeY |8 |a treeY |9 |x7 treeY |10 |b treeY |11 |g treeY |12 |nephew