Did you have in mind beforehand to compare that one particulkar response with the other responses? Or was this particular response chosen after inspection of the data?
Apart from that: the data are repeated measures, i.e. any of the 54 participants chose yes or no for each of the 14 stimuli (plus "other).
To analyse such data appropriately you'll need the individual behaviour of each participant. In that case, you can compare the responses to arbeitsrechtshelden.de with the responses to anwaltheute.de (the next frequent choice) using McNemar's test.
If you do not have the individual respones, then you can test on basis of an artificial scenario. That is, you assume that all of those who said "yes" to anwaltheute.de also said "yes" to arbeitsrechtshelden.de.
With kind regards
Karabiner