Question:  Lucas da Silva Carvalho was an unused reserve runner for a Brazilian athletics track event which at top class events is run in lanes for the first what?

Passages:
Lucas da Silva Carvalho (born 16 July 1993) is a Brazilian sprinter specialising in the 400 metres.  He represented his country at the 2017 World Championships without qualifying for the semifinals.  He was also an unused reserve runner for the Brazilian 4 × 400 metres relay at the 2016 Summer Olympics. The 4 × 100 metres relay or sprint relay is an athletics track event run in lanes over one lap of the track with four runners completing 100 metres each.  The first runners must begin in the same stagger as for the individual 400 m race.  A relay baton is carried by each runner and must be passed within a 20 m changeover box (usually marked by yellow lines) which extends 10 m on either side of each 100 m mark of the race.  Another line is marked 10 m farther back, marking the earliest point at which the outgoing runner may begin (giving up to 10 m of acceleration before entering the passing zone). The 4 × 400 metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400 metres or one lap.  It is traditionally the final event of a track meet.  At top class events, the first 500 metres is run in lanes.  Start lines are thus staggered over a greater distance than in an individual 400 metres race; the runners then typically move to the inside of the track. Albadilon da Silva Carvalho or simply Da Silva (born July 6, 1984 in Londrina), is a Brazilian footballer, currently playing as a central defender for Princesa. Daniel da Silva Carvalho (born 1 March 1983 in Jaguarão, Rio Grande do Sul), more commonly known as Daniel Carvalho, is a Brazilian football attacking midfielder for Goiás. Artur Zaczek (born 28 February 1989) is a Polish athlete specialising in the sprinting events.  He won a bronze medal in the 4 × 100 metres relay at the 2009 European U23 Championships in addition to three medals won in the same event at the Summer Universiades between 2009 and 2015.  He was also an unused reserve runner at the 2012 Summer Olympics, as well as the 2011 and 2013 World Championships. Jheimy da Silva Carvalho (Jacundá, August 6, 1988), is a Brazilian footballer who acts as a striker.  Currently plays for Oeste on loan from Atlético Mineiro. Marisa Letícia Lula da Silva (née Rocco Casa; São Bernardo do Campo, 7 April 1950 – São Paulo, 3 February 2017) was the second wife of former President of Brazil, Luiz Inácio Lula da Silva, and First Lady of Brazil from 2003 to 2010.  Lula's first wife, Maria de Lourdes da Silva, died in labour when Lula was in his twenties.  And Marisa'a first spouse, Marcos Cláudio da Silva, died in 1971.  On January 24, 2017 Marisa Letícia suffered a stroke.  She died on February 3, 10 days later at the age of 66 in Sírio-Libanês Hospital.  President Michel Temer declared three days of official mourning.  She was cremated the next day.  Her ashes were interred in the Cemitério Jardim da Colina, in her native São Bernardo do Campo, São Paulo. Lucas da Silva Izidoro (born 24 February 1996), known as Lucas Mineiro or simply Lucas, is a Brazilian footballer who plays as a midfielder for Chapecoense. Lucas da Silva Lucas known as Lucas Silva or just Lucas (born 25 November 1980) is a Brazilian footballer who plays for Nacional (AM).

Supporting sentences:
Lucas da Silva Carvalho (born 16 July 1993) is a Brazilian sprinter specialising in the 400 metres.  He was also an unused reserve runner for the Brazilian 4 × 400 metres relay at the 2016 Summer Olympics. The 4 × 400 metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400 metres or one lap.  At top class events, the first 500 metres is run in lanes.