"Hope," "Blood," and the name of the title character are the  three answers that Calaf must supply in order to keep his head 
"Hope," "Blood," and the name of the title character are the  three answers that Calaf must supply in order to keep his head and  win the title lady's hand in marriage. "Love" is in turn the  answer she gives to his counter challenge, after Liu shows the  power of her own love, choosing to stab herself rather than reveal  Calaf's name. This is the grand finale of, FTP, what Puccini opera,  in which the heralds proclaim "Nessun Dorma""until the answer to  the final riddle is found, no one shall sleep in Peking?
"Hope," "Blood," and the name of the title character are the  three answers that Calaf must supply in order to keep his head and  win the title lady's hand in marriage.
{Turandot}