[det]thread_create_in_pool(+Pool, 
:Goal, -Id, +Options)Create a thread in Pool. Options overrule default 
thread creation options associated to the pool. In addition, the 
following option is defined:
- wait(+Boolean)
 - If 
true (default) and the pool is full, wait until a member 
of the pool completes. If false, throw a resource_error. 
- Errors
 - - 
resource_error(threads_in_pool(Pool)) is raised if wait 
is false or the backlog limit has been reached. 
- existence_error(thread_pool, Pool) if Pool 
does not exist.