Float Break Expected

There should be three tall floats, each of which should extend into the next column (F2, F3) or into all columns (F1).

First
First

F2 First
First

F1 First
First
First
First
First
First

Second
Second

F3 Second
Second
Second
Second
Second
Second
Second

Third
Third
Third
Third
Third
Third
Third
Third
Third
Third