Assertion: voyager | /r/CapableOf | cross the threshold
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Source sentences:
text: Now, one probe has achieved a milestone in exploration: On December 10, NASA announced that Voyager 2 has entered interstellar space, six years after Voyager 1 first crossed the threshold.
text: Now, a day before the anniversary of that celestial exit, scientists have revealed what Voyager 2 saw as it crossed the threshold—