## Materials and Methods
### Word Scene Experiment  
The whole experiment is divided into six stages, and the public dataset contains fMRI data from the third stage to the sixth stage. This article mainly studies the data from the fifth stage.  
Before the fifth stage of the experiment, all the subjects learned 30 word-scene pairs and performed a memory test to ensure that the subjects remembered these pairs. At the same time, in order to disturb the memory of the subjects, before the fifth stage, each subject was displayed with 16 lure words. These words were not matched with the scene pictures. When the subjects were familiar with these lure words, these words were used as a lure set in the fifth stage. In addition, these subjects also carried out multiple-object tracking (MOT) tasks in advance in order to familiarize themselves with the tasks in the fifth stage.  
The main task of the fifth phase experiment is that the subjects recall the scenes associated with the words while performing the target tracking task. In the MOT task, the subjects will see 10 random points that do not overlap with each other on a black background, where the target point is red and the non-target point is green (in the case of multi-target tracking, there are five target point; there is only one target point for single target tracking). In addition, there is a white cross in the center of the screen. These points will be presented to the subjects for two seconds, after which all points will turn green and begin to move. Participants were asked to continuously track the originally red target point within 18 s. In addition, the fixed cross in the center is replaced by a word (which may or may not be a word of the word scene pair) in white with a small white dot in the center. Subjects need to recall the scene paired with the word in as much detail as possible. Every five seconds, the center white dot will turn red. At that time, the subject needs to rate the specific degree of the scene he imagined. When the MOT task ends, all the points stop moving, and one of them is displayed in white. Subjects need to press the button to answer whether the white point was originally a target point or a non-target point. After three seconds, the subjects received one second of feedback, indicating whether the answer was correct or not. Finally, in order to disturb the imagination of the scene image after the experiment, the subjects needed to complete two calculation tasks. The sum of two numbers was displayed on the screen for 1.9 s. Subjects needed to press the button to answer whether the sum of the two numbers was odd or even. The text is displayed in white. When the subject answers correctly, the text is displayed in green; when the answer is incorrect, the text is displayed in red. The interval between the two calculation tests is 0.1s. After the two tests, the screen is fixed for 4 s before the next MOT task starts. The total time of each task is 32 s.  
A total of 25 tasks were performed in each scan, of which there were ten single target tracking tasks with words from word-scene pairs (named as targ_easy), ten multiple target tracking tasks with words from word-scene pairs (named as targ_hard), and five multi-target tracking tasks with lure words (named as lure_hard). The order of tasks is random. In the fifth stage, three fMRI scans were performed, resulting in a total of 75 tasks.