Spain's Socialist PM Sanchez gets fresh bid to form government after conservatives' failure

Conservative leader Alberto Nunez Feijoo failed twice to gain parliamentary majority to become PM.
Feijoo's concession paves way for Socialist Pedro Sanchez's candidacy for new term.
July elections produced fractured parliament with 11 parties, making majority difficult.
Sanchez building coalition, possibly including Catalan separatists, to gain support.
If no government formed by November 27, another election to be held January 14.