# +-------+-------+----------------+-------------------------------+
# |       |       |       Topic    |       |         Topic         |
# | Topci | Topic +----------------+ Topic +-------+-------+-------+
# |       |       |  Topic | Topic |       | Topic | Topic | Topic |
# +------------------------+-------+-------+-------+-------+-------+
# | Bla   | Bla   | Bla    |  Bla  | Bla   | Bla   | Bla   | Bla   |
# | Bla   | Bla   | Bla    |  Bla  | Bla   | Bla   | Bla   | Bla   |
# +------------------------+-------+-------+-------+-------+-------+