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Those "Thracian" samples could've very well belonged to Greeks or Hellenized Pelasgians. On a similar note, the R1a-Z93 sample may actually be a Scythian. We cannot know for sure. Bones don't talk after all. Last but not least, it is important to keep in mind that the Classical period is relatively recent chronologically speaking.
See? No E-V13 in sight here.
This doesn't mean nor prove anything. The fact that Pelasgians didn't speak an Indo-European language doesn't mean their eventual descendants didn't. Moreover, Albanian has such a considerable non-IE substrate that it prompted some linguists to reconsider its status as an Indo-European language. Linguistics isn't exactly a hard science anyway.
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