May I suggest Kaggle?<p>The AllenAI Institute is currently running a pretty interesting contest there at the moment, with pretty direct links to OpenAI&#x27;s mission.<p>Of course Kaggle often degenerates into a &quot;who can drive xgboost[1] the best&quot;, but some of the feature engineering is quite novel.<p>A decent Winograd schema challenge would be pretty interesting.<p>[1] <a href="https:&#x2F;&#x2F;github.com&#x2F;dmlc&#x2F;xgboost#whats-new" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;dmlc&#x2F;xgboost#whats-new</a>