I want to add multiple attributes to many sentences each sentence has more than one attribute and store them in an easy-to-query way Which data storage method should I use

A relational database management system (RDBMS) would be a good choice for storing sentences with multiple attributes in an easy-to-query way. You can create a table with columns for the sentence, the attributes, and any other relevant information. Each sentence would have multiple rows in the table, with each row representing a specific attribute of the sentence. You can then use SQL queries to retrieve data based on specific attributes or combinations of attributes.