There should be two floats: one left, one right. Both should wrap into the
second column. The lines left6, left7,
right6, right7 (and their backgrounds) should appear
entirely in the second column.
First
First
First
First
left1
left2
left3
left4
left5
left6
left7
right1
right2
right3
right4
right5
right6
right7
First
First
First
First
First
First
Second
Second
Second
Second
Second
Second
Second
Second
Second
Second