Thursday evening, more than 150 residents from Jamaica Plain, Roxbury and Dorchester came to the Franklin Park Golf Clubhouse to listen to a presentation from the Boston 2024 executive bid committee. Event organizers from the Franklin Park Coalition expected an informative meeting for the community about what changes to the historic park could be expected, but instead attendees were met with few details and fewer answers. The plan, at least as presented Thursday, is to renovate half of White Stadium to accommodate more spectators for parts of the Modern Pentathlon, as well as some equestrian events. Also included was the proposal to build a permanent pool for use long after the closing ceremonies, and use of the golf course area for one of the equestrian competitions. At this stage in the planning process, Boston 2024 staff members at the meeting had a hard time answering detailed questions about how Franklin Park would be impacted, such as how long certain areas off the park would be closed off before and after the Olympics, and how new additions to the park would be maintained in the future.