 
<translate> Tambaya. Bayanin: Tun lokacin da aka kafa Kotun Koli a shekara ta 1789, mutane 17 sun yi aiki a matsayin babban alƙali. Na farko shi ne John Jay (1789 - 1795). Babban alkalin yanzu shine John Roberts (tun 2005). Hudu - Edward Douglass White, Charles Evans Hughes, Harlan Fiske Stone, da William Rehnquist - an tabbatar da su a baya don zama mataimakin mai shari'a kuma daga baya an tabbatar da su a matsayin babban mai shari'a daban.  Tambaya: wanene babban alkalin kotun kolin Amurka? Amsa wannan. John Roberts Wane bayani ne ya nuna cewa hakan gaskiya ne? <eng> 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? 