recent sighting/amn

21.   There had been recent sightings of these sharks in the river, it said.

a. + sighting >>共 123 个
reported 13.48%
first 9.16%
recent 5.66%
last 5.12%
unconfirmed 5.12%
confirmed 4.31%
possible 2.70%
false 2.43%
alleged 1.89%
visual 1.89%
recent + n. >>共 673 个
year 20.30%
week 9.12%
month 8.79%
day 6.38%
poll 1.39%
report 1.18%
study 1.09%
interview 1.05%
history 1.03%
visit 0.76%
sighting 0.03%
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