False positive length extraction

[tucotuco]

We get a false positive in Zooarchaeological dynamicProperties, exemplified by the following record:

http://portal.vertnet.org/o/uf/parnell-feature1?id=0088dc89-b567-4f97-adda-4ba9fb973e15

[tucotuco]

The cause is a date range pattern (e.g., "Date Collected":"2012-05/2012-06") making a false positive length range.