A tree-like diagram with a red line connecting the top two nodes, labeled "sp24" and "sp23", and a series of nodes with labels "sp22", "sp21", "sp19", "sp18", "sp17", "sp16", "sp14", "sp13", "sp12", "sp11", "sp10", "sp9", "sp8", "sp7", "sp6", "sp5", "sp4", "sp3", "sp2", "sp1", and "sp1" at the bottom.