I am trying to build an LSTM model to generate Shakspeare-like poems. I have data set $\{s_1, s_2, \dots, s_m \}$, which are sentences of Shakespeare poems, and each sentence contains words $\{w_1, w_2, \dots, w_n \}$.
I am wondering: Are different $s_i$ ($i=1, \dots, m$) independent and identically distributed samples (IID)? Are $w_i$ ($i=1, \dots, n$) within each sentence the IID?