Some of the action graphs have nodes that are not connected to any other node in the graph, e.g. "using" in line 92 in [homemade_pizza_dough_1](https://github.com/interactive-cookbook/alignment-models/blob/main/data/alignment/homemade_pizza_dough/recipes/homemade_pizza_dough_1.conllu) or "sprinkle" in line 107 in [slow_cooker_chicken_tortilla_soup_2](https://github.com/interactive-cookbook/alignment-models/blob/main/data/alignment/slow_cooker_chicken_tortilla_soup/recipes/slow_cooker_chicken_tortilla_soup_2.conllu)