THE 5TH ANNUAL DALLAS FESTIVAL OF BOOKS IDEAS PROMISES A LOT OF MOVING PARTS, INVOLVING DISCUSSIONS ABOUT THE ELDERLY, CULTURAL AND RACIAL DIVERSITY AND DALLAS AS A BEACON OF SCIENCE AND TECHNOLOGY. But that’s not all. This year’s festival also promises a candid look at Dallas’ present and future as a literary city. The 2019 version, which opens May 28 and runs through June 1, looms as a first for the festival, which is now a partnership, shared with The Dallas Morning News , the Dallas Institute of Humanities and Culture, the Dallas Public Library, Friends of the Dallas Public Library and the Dallas Museum of Art. Here’s a look at the topics the festival will cover: 1) “The Physical City” will consider the elderly and how Dallas can address “its elders’ needs and benefit from the wisdom and experience.” Its keynote speaker will be professor Emi Kiyota, an environmental gerontologist who directs the nonprofit Ibasho, whose motto is: “Creating socially integrated and sustain