With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Robert F. Kennedy was shot by Sirhan Sirhan in 1968.
text_B: Cator is a surname .. Notable people with the surname include  :. John Cator -LRB- 1728 -- 1806 -RRB- , British timber merchant and landowner. John Cator. John Cator. Geoffrey Edmund Cator -LRB- 1884 -- 1973 -RRB- , British civil servant. Geoffrey Edmund Cator. Geoffrey Edmund Cator. Harry Cator -LRB- 1894 -- 1966 -RRB- , English recipient of the Victoria Cross. Harry Cator. Harry Cator. Rhonda Cator -LRB- born 1966 -RRB- , retired female badminton player from Australia. Rhonda Cator. Rhonda Cator. Silvio Cator -LRB- 1900 -- 1952 -RRB- , Haitian athlete. Silvio Cator. Silvio Cator
not_related.