21.   Liu said he was put under surveillance, and that political label dogged him for two decades.

a. + label >>共 630
record 20.85%
major 8.80%
warning 8.17%
new 4.07%
private 3.34%
independent 3.11%
designer 2.85%
small 1.49%
party 1.22%
different 0.89%
political 0.69%
political + n. >>共 919
party 6.88%
leader 2.98%
prisoner 1.59%
analyst 1.43%
system 1.09%
reform 1.07%
crisis 1.03%
opponent 0.97%
career 0.97%
issue 0.93%
label 0.02%
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