li:{root} [root] FIRST li:{x} LAST ha:{x}
 li:{x} FIRST sy:{foo} LAST te:{bar3}
  sy:{foo} {bar}
  te:{bar1} {baz}
  li:{hah} 
  te:{bar2} {baz}
  ha:{heh} entries: 0
  te:{bar3} {baz}
 ha:{x} entries: 6
  te:{bar2} {baz}
  te:{bar3} {baz}
  li:{hah} 
  sy:{foo} {bar}
  ha:{heh} entries: 0
  te:{bar1} {baz}
