Question: What was Phil Lynott's most successful group that included Brian Downey in four songs?

Related documents: [0]  [DOC] Philip Parris "Phil" Lynott ( ; 20 August 1949 – 4 January 1986) was an Irish musician, singer and songwriter. His most commercially successful group was Thin Lizzy, of which he was a founding member, the principal songwriter, lead vocalist and bassist. He later also found success as a solo artist. [END] 
[1]  [DOC] Back on the Streets is an album by Northern Irish blues-rock guitarist Gary Moore, released in 1978, and his first authentic solo record (1973's "Grinding Stone" album being credited to "The Gary Moore Band"). Thin Lizzy bassist/vocalist Phil Lynott and drummer Brian Downey appear on four songs, including "Don't Believe A Word" (which originally appeared on the 1976 Thin Lizzy album "Johnny the Fox") and the UK top 10 single "Parisienne Walkways". On the album's sleeve, Moore is depicted leaving notorious prison Wormwood Scrubs in the Inner London Borough of Hammersmith and Fulham in a photograph by Chalkie Davies. [END]  
Answer: Thin Lizzy
Thin Lizzy