  To illustrate, consider the sentence ‘I am a philosopher’. Suppose that the agent of context \(c_1\) is Mary. Then the content of ‘I’ in \(c_1\) is Mary herself, while the content of ‘is a philosopher’ in \(c_1\) is the property of being a philosopher. The content of the whole sentence, in \(c_1\), is a proposition whose constituents are just those two items. We can represent this proposition with the ordered pair \(\langle \text{Mary},\) \(\text{being a philosopher} \rangle\).  A structured proposition which, like the preceding one, has an individual as a constituent, is a singular proposition. The content of ‘I’ with respect to another context \(c_2\), in which John is the agent, is John, and the content of ‘I am a philosopher’ in \(c_2\) is the singular proposition  \(\langle \text{John},\) \(\text{being a philosopher} \rangle\).