11.   The executives allegedly knew the building was shaky and that its top floor was crumbling hours before the collapse, but did not warn any one.

12.   They also were charged with knowing that the building was shaky and not warning that its top floor was crumbling.

13.   They were also charged with knowing that the building was shaky and for not warning that its top floor was crumbling.

n. + crumble >>共 293
wall 5.16%
economy 3.71%
empire 2.74%
building 2.42%
system 2.26%
marriage 2.10%
floor 2.10%
facade 1.45%
house 1.29%
team 1.29%
floor + v. >>共 263
be 38.59%
have 6.76%
collapse 3.97%
become 1.44%
crumble 1.17%
remain 1.17%
seem 1.08%
house 0.99%
need 0.99%
begin 0.99%
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