 
 <translate> The question Passage: The 2018 Texas gubernatorial election will take place on November 6, 2018, to elect the Governor of Texas, concurrently with the election of Texas's Class I U.S. Senate seat, as well as other congressional, state and local elections throughout the United States and Texas. Incumbent Republican Governor Greg Abbott is running for re-election to a second term in office and will face Democrat Lupe Valdez, the former Sheriff of Dallas County, as well as Libertarian Mark Tippetts, a former member of the Lago Vista city council.

Question: Based on this passage, who are the democrats running for governor of texas? <ibo> The question Passage: Ntuliaka maka ọkwa gọvanọ nke Texas nke afọ 2018 ga-eme na November 6, 2018, iji họpụta Gọvanọ nke Texas, n'otu oge ahụ na ntuliaka maka oche ndị omebe iwu nke Texas, yana ndị ọzọ na-eme ntuli aka na steeti na mpaghara na United States na Texas. Gọvanọ na-achị ugbu a bụ Greg Abbott na-agba ọsọ maka ntuliaka ọzọ maka oge nke abụọ n'ọfịs, ọ ga-ezute onye Democrat bụ Lupe Valdez, onye bụbu Sheriff nke Dallas County, yana onye Libertarian bụ Mark Tippetts, onye bụbu onye otu kansụl obodo Lago Vista.  Ajụjụ: Dabere n'akụkụ Akwụkwọ Nsọ a, ole ndị bụ ndị Democrats na-azọ ọkwa gọvanọ Texas? 