Whos cicada? (not the bug: cicada)

Cicada 3301 is a nickname given to an organization that, on three occasions, has posted a set of puzzles to recruit codebreakers from the public. The first internet puzzle started on January 4, 2012, on 4chan and ran for nearly a month. A second round began one year later on January 4, 2013, and then a third round following the confirmation of a fresh clue posted on Twitter on January 4, 2014. The third puzzle has yet to be solved. The stated intent was to recruit "intelligent individuals" by presenting a series of puzzles which were to be solved. No new puzzles were published on January 4, 2015. However, a new clue was posted on Twitter on January 5, 2016. In April 2017, a verified PGP-signed message was found. It explicitly denies the validity of any unsigned puzzle. A verified puzzle has not been posted since.

the third answer

explanation:

because

ichabod crane is a fictional character and the protagonist in washington irving's short story, "the legend of sleepy hollow", first published in 1820. in popular culture, this story is sometimes retitled as "the headless horseman."