In four years, you'll have to dig deep, deep into the archives of the scientific literature to find out what happened to this project, and why it failed totally.
Oh, and the $24 mil? That'll be looking fine, in the form of wine cellars and indoor swimming pools for all the earnest BBN managers, located in the most upscale, most liberal suburbs of Beantown USA.
The Japanese sank about 10 billon into a "Fifth Generation" language project that was suppose to be the end of programming.