[tag=□]? □ □
[tag=VBZ]? □ □
[tag=NNS]? □ □
The principal investigator was present to watch the observations execute . All the observations executed with no apparent problems in the telemetry . The observations executed as scheduled , and no problems were reported . One additional criteria for membership was that all registrars execute a Non-Disclosure / Non-Competition Agreement ( " NDA " ) , agreeing that they would not participate in discussions regarding , or otherwise join , endorse , or fund , another bid for an unrestricted TLD . The basic idea which permits to express authentication requirements using NI-based properties is very simple : we want to check if an enemy is able to interfere with the correct execution of the protocol ; so , what we do is to check if the actions executed by the enemy interfere with the actions which characterize the successful authentication . Nonetheless , we knew what we had to do to win , and the boys executed the plan perfectly .