Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Bolivia stunned Ecuador with three goals in the first half as they climbed to the top of Group A with victory at the Elias Figueroa Stadium Monday night - their first competitive win away from home since 1995. Captain Ronald Raldes gave Bolivia the lead after just four minutes before Martin Smedberg-Dalence increased the advantage shortly after. Enner Valencia missed the chance to make it 2-1 when the West Ham striker saw his penalty saved by goalkeeper Romel Quinonez. Bolivia were three up on the stroke of half-time through Martins Moreno, who succeeded where Valencia had failed and converted from the penalty spot to give El Verde a commanding lead.Bolivia captain Ronald Raldes gave his side the lead in the fourth minuteMartin Smedberg-Dalence doubled the lead for Bolivia inside 20 minutesMartins Moreno made it 3-0 before half-time from the penalty spotEnner Valencia pulled a goal back for Ecuador minutes after the intervalMiller Bolanos scored from distance to make it 3-2 but Bolivia hung on 
 Question:_ were presented with the perfect opportunity to half the arrears when Valencia was tugged back at the far post by Edward Zenteno.

Ecuador