 <translate> Question. Context: Since the Supreme Court was established in 1789, 17 persons have served as chief justice. The first was John Jay (1789 -- 1795). The current chief justice is John Roberts (since 2005). Four -- Edward Douglass White, Charles Evans Hughes, Harlan Fiske Stone, and William Rehnquist -- were previously confirmed for associate justice and subsequently confirmed for chief justice separately.

Question: who is the chief justice of the united states supreme court?
Answer. John Roberts
What step-by-step reasoning justifies that answer? <yor> Ìbéèrè kan. Àyíká ọ̀rọ̀: Látìgbà tí wọ́n ti dá Ilé Ẹjọ́ Gíga Jù Lọ sílẹ̀ lọ́dún 1789, èèyàn mẹ́tàdínlógún ló ti sìn gẹ́gẹ́ bí adájọ́ àgbà. Àkọ́kọ́ ni John Jay (1789 - 1795). Aare idajọ lọwọlọwọ ni John Roberts (lati ọdun 2005). Mẹrin -- Edward Douglass White, Charles Evans Hughes, Harlan Fiske Stone, àti William Rehnquist -- ni a ti fìdí wọn múlẹ̀ ṣáájú fún ipò adájọ́ olùrànlọ́wọ́ àti lẹ́yìn náà tí a fìdí wọn múlẹ̀ fún ipò adájọ́ àgbà lọ́tọ̀ọ̀tọ̀.  Ìbéèrè: ta ni adájọ́ àgbà ilé ẹjọ́ gíga jùlọ ti orílẹ̀-èdè amẹ́ríkà? Dáhùn. John Roberts Kí ló mú kí ìdáhùn yẹn bọ́gbọ́n mu? 