Actually it's pretty easy to distinguish a noun phrase from not a noun one. Everything you need to know whether the highlighted object is noun(also can be pronoun or rarely adjective), that's it. So, (the two squirrels) (to my sister) (my water) are parts of the noun sentences and (to go dancing) is expressed by action, so that is the answer.
a peace treaty between Israel and Egypt
Renewable energy sources are important in Eastern Europe because they allow sustainable development.