id: 13 media ( 7, (0, 0, 0, 7)) (( 0.8, 0.7 ), ( 2.4, 1.8 ))
 +4                    +0 
                     |
               2011     |
 +    +    +    +    +
                     |
                     |
                     |
                     |
 +    +    +    +    +
        2013      2012     |
                     |
                     |
                     |
 +    +   +    +    +
                     |
        2017 16 14            |
                     |
                     |
 +    +    +    +    +
                     |
                     |
                     |
  2015                  |
 +    +    +    +    +
                     |
                     |
                     |
                     |
 0+----+----+----+-----3