 
 <prompt> ```Wen dem replace di Central Artery? Based on di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context:``` <response>: ```Downtown Boston streets grow naturally, so dem no dey form planned grid like the ones for Back Bay, East Boston, the South End, and South Boston wey develop later. Boston na di eastern end of I-90, wey dey run along Massachusetts Turnpike for Massachusetts. The elevated part of Central Artery wey dey carry most of the through traffic for downtown Boston don replace with O'Neill Tunnel during the Big Dig, wey dem finish mostly for early 2006.``` 