Fixed broken link in model explainatility notebook.
"source": [
"# Understand your NLP models\n",
"\n",
- "This is a tutorial on how to utilize Interpreter class to explain certain hidden layers in your NLP models. We provide the explanation by measuring the information of input words ${\\bf x}_1,...,{\\bf x}_n$ that is encoded in hidden state ${\\bf s} = \\Phi({\\bf x})$. The method is from paper <a href="https://www.microsoft.com/en-us/research/publication/towards-a-deep-and-unified-understanding-of-deep-neural-models-in-nlp/" target="_blank"><i>Towards a Deep and Unified Understanding of Deep Neural Models in NLP</i></a> that is accepted by **ICML 2019**. In this torturial, we provide two examples for you to start quickly. The contents are as following:\n",
+ "This is a tutorial on how to utilize Interpreter class to explain certain hidden layers in your NLP models. We provide the explanation by measuring the information of input words ${\\bf x}_1,...,{\\bf x}_n$ that is encoded in hidden state ${\\bf s} = \\Phi({\\bf x})$. The method is from paper [*Towards a Deep and Unified Understanding of Deep Neural Models in NLP*](https://www.microsoft.com/en-us/research/publication/towards-a-deep-and-unified-understanding-of-deep-neural-models-in-nlp/) that is accepted by **ICML 2019**. In this torturial, we provide two examples for you to start quickly. The contents are as following:\n",
"\n",
"0. [Methodology](#0-Methodology)\n",
"\n",
