unclassified_at=1 (select unclassified events)
classified_sne=1  (select classified SNe)
format=tsv        (output format is tab seperated)
num_page=500      (maximum number of records per page; now set to 500 by TNS)
page=0            (show page 0, 1, 2..)


https://wis-tns.weizmann.ac.il/search?&unclassified_at=1
&date_start%5Bdate%5D=2019-12-01
&date_end%5Bdate%5D=2019-12-31
&format=tsv
&num_page=500
&page=0