11.   Why have Rioja wines improved?

n. + improve >>共 1228
condition 7.51%
situation 5.26%
economy 4.13%
thing 2.97%
relation 2.64%
step 2.27%
business 2.26%
technology 1.71%
weather 1.63%
sale 1.20%
wine 0.16%
wine + v. >>共 255
be 46.24%
have 6.87%
go 2.39%
come 2.32%
become 1.45%
make 1.45%
taste 1.16%
seem 1.09%
take 0.94%
contain 0.87%
improve 0.80%
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