"τίς" meaning in Greek

{
  "forms": [
    {
      "form": "tís",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "pronoun"
      },
      "expansion": "τίς • (tís)",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "tis",
          "word": "τις"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Greek pronouns",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "who is at fault?",
          "roman": "tís ptaíei?",
          "text": "τίς πταίει;",
          "type": "example"
        },
        {
          "english": "who are you?",
          "roman": "tís eî?",
          "text": "τίς εἶ; (military, recognition)",
          "type": "example"
        },
        {
          "english": "in what way?",
          "roman": "tíni trópōi?",
          "text": "τίνι τρόπῳ;",
          "type": "example"
        }
      ],
      "glosses": [
        "Polytonic spelling of τις (tis)"
      ],
      "id": "en-τίς-el-pron-bQv~VY8w",
      "links": [
        [
          "τις",
          "τις#Greek"
        ]
      ],
      "tags": [
        "alt-of",
        "polytonic"
      ]
    }
  ],
  "word": "τίς"
}

{
  "forms": [
    {
      "form": "tís",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "pronoun"
      },
      "expansion": "τίς • (tís)",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "pron",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "tis",
          "word": "τις"
        }
      ],
      "categories": [
        "Greek entries with incorrect language header",
        "Greek lemmas",
        "Greek pronouns",
        "Greek terms with usage examples"
      ],
      "examples": [
        {
          "english": "who is at fault?",
          "roman": "tís ptaíei?",
          "text": "τίς πταίει;",
          "type": "example"
        },
        {
          "english": "who are you?",
          "roman": "tís eî?",
          "text": "τίς εἶ; (military, recognition)",
          "type": "example"
        },
        {
          "english": "in what way?",
          "roman": "tíni trópōi?",
          "text": "τίνι τρόπῳ;",
          "type": "example"
        }
      ],
      "glosses": [
        "Polytonic spelling of τις (tis)"
      ],
      "links": [
        [
          "τις",
          "τις#Greek"
        ]
      ],
      "tags": [
        "alt-of",
        "polytonic"
      ]
    }
  ],
  "word": "τίς"
}