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: Washington (CNN) Newt Gingrich released his new book, "Understanding Trump," on Tuesday, sharing insights the former House Speaker says he gleaned both during the Trump campaign and in the first months of his presidency. So in pursuit of "understanding Trump," CNN read the first chapter available online. Here are 10 top takeaways: 1. The foreword is written by none other than Eric Trump. Eric Trump lauds Understanding Trump as an "inside look into possibly the greatest campaign of all time," citing how his father "gained the most primary votes of any GOP candidate in the history of the nation." Eric Trump also took time in his foreword to offer praise for his father, President Donald Trump, slipping in a classic "Make America Great Again" tag line:Understanding Trump provides insights into Trump campaignGingrich says Trump reminds him of Bill Clinton 
 Question:_ learned how to perform every job in his hotel business -- dog-walking included!.

Understanding Trump