<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def execute(self, env, args):
 """ Starts a new task. `env` Runtime ``Environment`` instance. `args` Arguments object from arg parser. """


        # start the task
        if env.task.start(args.task_name):
            env.io.success(u'Task Loaded.')