Task: Question Answering
Input (English): Information Gathering: At step $t$ of the information gathering phase, the agent can issue one of the following four actions to interact with the paragraph $p$, where $p$ consists of $n$ sentences and where the current observation corresponds to sentence $s_k,~1 \le k \le n$:

previous: jump to $ \small {\left\lbrace \begin{array}{ll} s_n & \text{if $k = 1$,}\\ s_{k-1} & \text{otherwise;} \end{array}\right.} $

next: jump to $ \small {\left\lbrace \begin{array}{ll} s_1 & \text{if $k = n$,}\\ s_{k+1} & \text{otherwise;} \end{array}\right.} $

Ctrl+F $<$query$>$: jump to the sentence that contains the next occurrence of “query”;

stop: terminate information gathering phase. 
 Question: What commands does their setup provide to models seeking information?
Output (English): previous next Ctrl+F $<$query$>$ stop