a4_written 2(c) / (i) in calculating BLEU for c_1, BP is wrong.

[soumitrapy]

Here reference sentence will be r_1. and len(r_1) = 11 hence BP should be exp(-2/9).

[soumitrapy]

another mistake:

2.c.i.

BLEU score for c_2: p_2 = 3/5

2.c.ii. BLEU score for c_2: p_1 = 3/6 = 1/2

[floriankark]

Thanks for pointing that out in 2 (c) i.

• I will change len(r_2) = 6 to len(r_1) = 11 and therefore BP = exp(-2/9) instead of BP = 1 as now we got len(r) >= len(c).
• Maybe you could explain why 3/5 is correct?
• I am sorry for the horrible mistake p_1 = 3/6 = 1. Fortunately I didn't work with that further, but I will change it to 1/2 of course.

[soumitrapy]

2.c.i. BLEU score for c_2: here c_2 = resources be sufficient and predictable to 2-grams are: "resources be", "be sufficient", "sufficient and", "and predictable", "predictable to" Now the 2-grams "be sufficient" , "sufficient and" exists in r_1 also "and predictable" exists in r_2. hence p_2 = 3/5.

[floriankark]

I see, thanks for the clarification. I simply just overlooked one 2-gram!