What is the fine-grained topic of the following text: JOHANNESBURG, Dec 4 (Reuters) - Anglo Platinum (AMSJ.J) said on Tuesday it would lose 9,000 refined platinum ounces due a strike by South Africa’s biggest miners’ union, and said the loss was already factored in its slashed 2007 output forecast. Only return the topic.
Anglo Platinum's loss due to miners' union strike in South Africa