Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE papers ( paperid VARCHAR, title VARCHAR )
TABLE: CREATE TABLE authorship ( authid VARCHAR, paperid VARCHAR )
TABLE: CREATE TABLE authors ( lname VARCHAR, authid VARCHAR )

### Question ###
Find the last names of all the authors that have written a paper with title containing the word 'Monadic'.

### Accurate SQL ###

SELECT t1.lname FROM authors AS t1 JOIN authorship AS t2 ON t1.authid = t2.authid JOIN papers AS t3 ON t2.paperid = t3.paperid WHERE t3.title LIKE "%Monadic%"