Mexico City (CNN) -- Hours after Mexico's presumed president-elect, Enrique Peña Nieto, said it was time for his country to leave behind the political rancor of campaign season, his closest opponent in the polls refused to concede and said the vote had been "plagued by irregularities." 

Andres Manuel Lopez Obrador, who election authorities projected as the runner-up in Sunday's presidential vote, said Monday that he was awaiting the official election results, and prepared to contest them before judicial authorities if they didn't turn out in his favor. 

"The election was plagued by irregularities before, during and after the process," said Lopez Obrador. 

The Democratic Revolution Party candidate's declarations echoed comments he made in 2006, when election authorities said the leftist candidate narrowly lost the presidential race to Felipe Calderon. Lopez Obrador claimed election fraud and never conceded, referring to himself afterward as "the legitimate president of Mexico." 

His supporters protested nationwide. In Mexico City, they staged sit-ins and blockades. 

On Monday, Lopez Obrador called on his supporters to wait for the official results. The Federal Election Institute's verification of individual poll results begins Wednesday. 

Earlier, Peña Nieto, who election authorities projected as the winner of Sunday's presidential vote, told CNN en Español he was ready to work across party lines to build a better Mexico. 

"We have to be constructive and put aside our differences, which are only for competitions and electoral contests," Peña Nieto said Monday. "Yesterday I indicated that (after) this tense and divisive atmosphere, which is natural in all democratic contests, we have to turn the page and move on to enter another chapter, another moment in our political lives, with a willingness and spirit that are constructive and purposeful."  QUESTIONS:

Q1:
1. Who is Andres Manuel Lopez Obrador in this text?
2. What is the role of Andres Manuel Lopez Obrador in this text?
3. 
Q2:
1. Does Andres Manuel Lopez Obrador believe that there is something wrong with the election?
2. Is there something wrong with the election, according to Andres Manuel Lopez Obrador?
3. 
Q3:
1. What office was Andres Manuel Lopez Obrador running for?
2. What government position was Andres Manuel Lopez Obrador trying to obtain?
3. 
Q4:
1. In which country did the election take place?
2. The presidential elections took place in which country?
3. 
Q5:
1. Has Andres Manuel Lopez Obrador ever run for president?
2. Did Andres Manuel Lopez Obrador previously try to win the presidential elections?
3. 
Q6:
1. In what year did Andres Manuel Lopez Obrador previously run for president?
2. When did Andres Manuel Lopez Obrador previously run for president?
3. 
Q7:
1. What is the name of the person that won the presidential elections in 2006?
2. Which presidential election candidate won the election in 2006?
3. 
Q8:
1. What is the name of the person who won the election this time?
2. This presidential election was won by which candidate?
3. 
Q9:
1. What did Andres Manuel Lopez Obrador's supporters do following the election results?
2. What was the reaction of Andres Manuel Lopez Obrador's supporters after losing the election?
3. 
Q10:
1. What is the name of the agency that is verifying the election results?
2. The election results are being verified by which agency?
3. 
Q11:
1. What is the name of the US news agency that Enrique Peña Neto spoke to?
2. Enrique Peña Neto spoke to which US news agency following the election?
3. 
Q12:
1. What title has Andres Manuel Lopez Obrador given himself following the 2006 election?
2. What did Andres Manuel Lopez Obrador call himself following the outcome of the 2006 election?
3. 
Q13:
1. Has Andres Manuel Lopez Obrador conceded the 2006 election?
2. Has the 2006 election been conceded by Andres Manuel Lopez Obrador?
3. 
