Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: What was the name of the convicted rapist/murderer's mother that Don Dunstan advocated for? Passage:In the late 1950s, Dunstan became well known for his campaign against the death penalty being imposed on Max Stuart, who was convicted of rape and murder of a small girl. He harried Premier Thomas Playford IV aggressively over the matter, creating an uproar over what he saw as an unfair process. Playford eventually relented, and appeared shaken thereafter; the event was seen as a turning point in the Liberal and Country League's decline, and Labor gained momentum. During Labor's time in opposition, Dunstan was prominent in securing some reforms in Aboriginal rights, and was at the forefront of Labor abandoning the White Australia Policy. Labor conducted an extensive campaign in marginal LCL seats at the 1965 election, resulting in 21 of 39 seats, with Frank Walsh and the Labor Party taking power and Dunstan becoming Attorney-General. The LCL opposition changed leaders and installed the young Steele Hall, worrying Labor as the elderly Walsh appeared bumbling in contrast. This resulted in Labor replacing Walsh with Dunstan. Despite maintaining a much larger vote over the LCL, Labor lost two seats at the 1968 election, with the LCL forming government with support of an independent. Dunstan responded by increasing his attacks on the Playmander and was able to convincingly sustain Playmander attacks with the effect of convincing the LCL into watering down the malapportionment. Again with little change in Labor's vote but with the Playmander removed, Labor won 27 of 47 seats at the 1970 election. With a fairer seat and boundary system in place, Dunstan won three more elections, in 1973, 1975 and 1977.


a